Prefix List - 2018

This list includes the most common prefixes (a word element that only used as a prefix) and combining forms. Please note that prefixes can be used by itself (prefix), with space (prefix ), or with hyphen (prefix-). For example, prefix of "non" can be added to word significant as:

  • nonsignificant|significant
  • non-significant|significant
  • non significant|significant
The following tables list all prefixes for Lexical Tools derivations:

 PrefixClassSenseNegationExamplePrecisionInstancesOccurrencesExceptionsStatus
1 Afro O relating to Africa O Afro-American 60.00% 20 12 8 2012
2 Anglo O relating to England O Anglo-Irish 45.83% 24 11 13 2012
3 Euro O European O Eurocentric 37.50% 16 6 10 2012
4 Franco O French, France O Francophile 0.00% 6 0 6 2012
5 Indo O relating to the Indian subcontinent O Indo-European 52.38% 21 11 10 2012
6 a B lacking in, lack of, not, without N asexual, asymmetric 26.72% 1310 350 960 2012
verb > predicative adjective with progressive aspect O afloat, atremble
on, in, at O abed, amidst, ashore
in (such) a state or condition O afresh
in (such) a manner O aloud, alive
7 abs O away, from O abstract 0.00% 15 0 15 2014
8 af O addition or increase O affirm 4.62% 65 3 62 2014
9 ambi O both O ambitendency 50.00% 28 14 14 2012
10 amphi O two, both, on both sides O amphiaster, amphitheater, amphibian 62.50% 40 25 15 2012
11 an B lacking in, lack of, not, without N anemic 36.27% 295 107 188 2012
up, against O anode
12 ana O up, against O anatoxin 17.89% 95 17 78 2012
13 ante O before O antenatal 61.02% 59 36 23 2012
14 anti N opposite, against N anti-war, antivirus, anti-human 76.19% 6804 5184 1620 2012
15 apo O away, different from O apomorphine 61.17% 188 115 73 2012
detached, separate O apocarpous
formed from, related to O apocodeine
16 arch O supreme, highest, worst O archangel 16.22% 37 6 31 2012
preeminent, extreme O archcapitalist, archinfamy
first in time, primitive O archfather, archform
17 astro O star O astrobiology 46.34% 41 19 22 2012
astrological, astrological and O astrodiagnosis, astromedical
aster in cells O astrosphere
18 at O change into, movememnt to, addition or increase O attend 3.80% 79 3 76 2014
19 auto O self O autobiography, automatic 43.96% 819 360 459 2013
automatic, self-acting, self-regulating O autofeed, autowind
of, by, affecting or for the same individual O autohemagglutination, autovaccine
self-caused, self-induced O autointoxication
acting as an antibody on or produced as an antibody for one’s own antigens O autoagglutinin, autohemolysin
20 be O equipped with, covered with, beset with (pejorative or facetious) O bedeviled, becalm, bedazzle, bewitch 20.73% 193 40 153 2012
to a great degree, thoroughly O becudgel, befuddle, bespatter
about, to, at, upon, against; intransitive verbs from intransitive verbs O bestride, bespeak
make, cause to be, treat as; verbs from adjectives or nouns O belittle, benumb, befriend
chemical prefix of unknown meaning O bekanamycin, bemethyl
21 bi O two O bicycle 44.60% 879 392 487 2012
22 bio O biological O biodegrade 48.95% 1091 534 557 2012
23 bis O both; of or belonging to both; two O bisischiatic, bismarine 72.22% 108 78 30 2014
doubled O bisdimethylamino, bisquaternary
24 cardio O heart; cardiac; heart action O cardiokymography 59.20% 326 193 133 2015
25 circum O around O circumnavigate 58.06% 124 72 52 2012
26 cis O on this side O cis-vaccenate 78.57% 42 33 9 2014
27 co O joint, with, accompanying O co-worker, coordinator, cooperation, cohabit 36.53% 1355 495 860 2012
in or to the same degree O coextensive, coeval
operating together or reciprocally O coterm
of the complement of an angle O cosine, codeclination
28 col O together or with O colleague 8.75% 80 7 73 2012
colon O colectasia
29 com O together or with O commingle 1.73% 173 3 170 2012
30 con O together or with O confederation 12.80% 414 53 361 2012
cone O conus
31 contra N opposite N contradict 38.10% 84 32 52 2012
32 cor O together or with O correlation 6.31% 111 7 104 2012
33 counter N against, in opposition to N counteract, counterpart 54.94% 415 228 187 2012
34 cryo O ice O cryogenics 50.90% 332 169 163 2012
35 crypto O hidden, secret O cryptography 66.10% 59 39 20 2012
36 de B reverse action, get rid of N de-emphasise 33.44% 1917 641 1276 2012
down O depress
get off of (something) O detrain, deplane
derived or compounded from (something) O deacetyl
having removal of one or more atoms of (a specified element) O dehydro-, deoxy-
37 demi O half O demiembryo, demispan 64.71% 17 11 6 2012
38 demo O people O demography 0.00% 14 0 14 2012
39 di O two O dioxide 71.94% 1689 1215 474 2012
40 dif O apart O differ 5.00% 20 1 19 2014
41 dis N not, opposite of N disloyal, disagree 31.86% 725 231 494 2014
reverse action, get rid of N disconnect, disinformation
apart N dissect
42 down O to make something lesser, lower or worse O downgrade 47.37% 228 108 120 2016
43 du O two O duet 1.61% 62 1 61 2013
44 duo O two O duovirus 53.85% 13 7 6 2013
45 dys B abnormal, diseased, bad, unfavorable,faulty N dysplasia, dyspathy, dysfunction 63.39% 254 161 93 2012
difficult, with difficulty O dysmenorrhea, dysoxidize
absence or reverse of O dysteleology
46 eco O ecological O ecosystem 38.89% 90 35 55 2013
47 electro O electric, electricity O electroablation 50.46% 765 386 379 2013
electromagnetic O electrochronograph
electron-related O electrophilic
48 em O to make into, to put into, to get into O empower 16.87% 83 14 69 2013
to provide with O empower
to cause to be (sometimes with suffix –en) O embolden
so as to cover or surround; thoroughly O embower
49 en O to make into, to put into, to get into O enmesh 28.33% 353 100 253 2013
in, within, inside O endermic, enzootic
chemically saturated; having one double bond O enamine
50 epi O upon, at, close upon, in addition O epidermis 48.13% 374 180 194 2013
petrographically altered O epidiorite
epimer of a specified chemical compound O epicholesterol, epirhamnose
chemical compound or group distinguished from another by having a bridge connection O epichlorhydrin
51 ex O former O ex-wife 15.48% 336 52 284 2013
out of O export
52 extra O outside O extracurricular 68.90% 1476 1017 459 2013
53 fore O before O forearm, forerunner 43.45% 168 73 95 2013
at or toward the front; the front part of something O forearm
54 geo O relating to the earth or its surface O geography 51.59% 126 65 61 2013
55 gyro O spinning on an axis O gyrokinetic 33.33% 15 5 10 2013
in a ring or spiral O gyromancy
56 haem O blood O haemagglutinin 35.38% 65 23 42 2014
57 haemo O blood O haemodialysis 48.18% 220 106 114 2014
58 hem O blood O hemagglutinin 21.92% 73 16 57 2014
blood O hemagglutinin
blood O hemagglutinin
59 hemi O half O hemiataxia 58.22% 438 255 183 2013
60 hemo O blood O hemodialysis 48.21% 224 108 116 2014
61 hetero O different O heterosexual 51.21% 373 191 182 2013
isomeric with or closely related to a (specified) compound O heteroxanthine
62 homo O same O homogenous, homologous 55.52% 335 186 149 2013
homologous with a (specified) organic compound O homoserine
from the same species; corresponding in type of structure O homograft, homolysin
63 hydro O relating to water, or using water O hydroelectricity 58.55% 345 202 143 2013
containing hydrogen O hydroborate
characterized by an accumulation of fluid in a (specified) body part O hydronephrosis
hydroid O hydromedusa
64 hyper O above, over O hyperthermia 55.86% 1330 743 587 2013
65 hypo O under or below something, low O hypothermia 59.17% 698 413 285 2014
66 ideo O image, idea O ideograph 37.04% 27 10 17 2014
67 idio O individual, personal, unique O idiographic 34.69% 49 17 32 2014
68 il N not, opposite of N illegal 24.49% 49 12 37 2014
69 im N not, opposite of N immature 22.10% 362 80 282 2014
70 in B in, into O insert 34.25% 1711 586 1125 2014
not, opposite of N inexact
71 infra O below, beneath O infrared 65.55% 508 333 175 2014
72 inter O among, between O intercede, interstate, interact 65.67% 4203 2760 1443 2012
73 intra O inside, within O intravenous 66.23% 3622 2399 1223 2012
74 ir N not, opposite of N irregular 30.99% 142 44 98 2014
75 iso O equal O isochromatic 74.20% 814 604 210 2014
76 macro O long O macrobiotic 56.93% 339 193 146 2014
77 mal O bad(ly) O malfunction 28.12% 160 45 115 2014
78 maxi O very long, very large O maxi-circle 25.00% 16 4 12 2014
79 mega O great, large O megabase 62.89% 159 100 59 2014
80 megalo O great, large O megastar, megalopolis 62.07% 29 18 11 2014
81 meta O after, along with, beyond, among, behind O meta-theory 59.56% 638 380 258 2014
82 micro O small O microautoradiogram 51.25% 2115 1084 1031 2014
83 mid O middle O midlife 51.47% 849 437 412 2014
84 midi O medium-sized O midiplasmin 100.00% 2 2 0 2014
85 mini O small O minibus 61.36% 220 135 85 2014
86 mis N wrong, astray N misinformation, misguide 49.17% 539 265 274 2014
87 mono O sole, only O monogamy 62.74% 832 522 310 2014
88 moto O movement O motoneuron 25.00% 20 5 15 2015
89 multi O many O multi-storey 57.35% 4054 2325 1729 2012
many times over; in many respects O multimillionaire, multispecialist
affecting many parts O multiglandular
90 neo O new O neolithic 53.15% 397 211 186 2014
91 non N not N nonexistent 75.83% 17189 13035 4154 2012
92 ob O blocking, against, concealing O ibstruct 4.00% 50 2 48 2014
93 oc O blocking, against, concealing O occult 0.00% 28 0 28 2014
94 of O blocking, against, concealing O offend 0.00% 7 0 7 2014
95 omni O all O omnipotent, omnipresent 47.83% 23 11 12 2012
96 op O blocking, against, concealing O oppose 2.00% 50 1 49 2014
97 ortho O correcting or straightening O orthodontics, orthotropic 68.23% 192 131 61 2012
indicates a 1,2-substituted benzene ring in organice chemistry O orthonitrophenol
indicates the common form of an acid in inorganic chemistry O orthoboric acid
chemical prefix O orthoformate
98 out O better, faster, longer, beyond O outreach, outcome 18.58% 323 60 263 2012
99 over O too much O overreact, overact 47.68% 1424 679 745 2012
100 paed O child O paedogenetic 0.00% 2 0 2 2014
101 paedo O child O paedogenetic 77.78% 9 7 2 2014
102 paid O child O NONE �% 0 0 0 2013
103 paido O child O NONE �% 0 0 0 2013
104 paleo O old O paleolithic 49.23% 65 32 33 2012
105 pan O all, worldwide O pan-African 52.41% 311 163 148 2012
106 para O beside, beyond O parallel 64.75% 976 632 344 2012
isomeric with, polymeric with, or otherwise closely related to O paracasein
the relation of two opposite positions in the benzene ring that are separated by two carbon atoms O parasymphysial
a derivative in which two substituting groups occupy such positions O para-xylene
107 ped O foot O pedestrian 6.67% 15 1 14 2012
creature or object having feet or footlike projections O Pediastrum, pedrail
something (specified) involving feet O pedomotor
child O pedogenetic
108 pedo O child O pedogenetic 31.82% 22 7 15 2014
109 per O through, completely, wrongly, exceedingly O permeate, permute 29.58% 284 84 200 2012
in chemistry, to denote a large amount or designate combination of an element in its highest valence O perchloroethylene
110 peri O around O periabdominal 72.02% 1955 1408 547 2012
near O perihelion
enclosing, surrounding O perineurium
tissue surrounding (specified part) O periarthritis
111 photo O light, photography, photograph O photoelectric 67.26% 956 643 313 2012
112 pod O foot O podiatrist 0.00% 16 0 16 2012
113 poly O many O polygon 67.22% 1028 691 337 2012
chemistry--containing more than one and especially more than two or three units of (a specified substance) O polyatomic
chemistry--polymer of, polymerized O polyethylene
chemistry--isopoly- O polymolybdate
114 post O after O post-election, post-graduation, postpone 79.73% 9748 7772 1976 2012
115 pre O before O pre-election, pre-enter, predict 73.99% 9981 7385 2596 2012
116 preter O beyond, past, more than O preternatural 10.00% 10 1 9 2012
117 pro O for, on the side of O pro-life 41.19% 1078 444 634 2013
substitute, deputy O proconsul
before O procambium
118 pros O toward O Prosthesis 16.67% 18 3 15 2012
119 proto O first, original O protoplasm, prototype 58.58% 169 99 70 2012
120 pseudo O false, imitation O pseudonym 62.77% 3489 2190 1299 2012
121 pyr O fire O pyroantimonate 19.23% 26 5 21 2014
in chemistry, indicates a dimeric acid anhydride O pyrophosphoric acid
due to or or attributed to the action of fire or heat O pyrochlore
of fiery color O pyrophanite
fever, fever producing O pyrotoxin
122 pyro O fire O pyroantimonate 53.44% 131 70 61 2012
in chemistry, indicates a dimeric acid anhydride O pyrophosphoric acid
due to or or attributed to the action of fire or heat O pyrochlore
of fiery color O pyrophanite
fever, fever producing O pyrotoxin
123 quasi O partly, almost, appearing to be but not really O quasiaxial 61.88% 341 211 130 2012
124 re O again, back O rerun 37.11% 4503 1671 2832 2012
125 retro O backwards O retrograde 51.20% 375 192 183 2014
126 self O self O self-sufficient 47.37% 817 387 430 2014
127 semi O half O semicircle 51.27% 942 483 459 2014
128 socio O society, social, sociological O sociopath 50.47% 212 107 105 2014
129 step O family relation by remarriage O stepbrother 11.97% 142 17 125 2014
130 sub O below, under O subway 63.22% 4358 2755 1603 2012
131 sup O below, under O support 1.92% 52 1 51 2014
132 super O above, over O supervisor 48.42% 1580 765 815 2014
133 supra O above, over O suprarenal 62.08% 1097 681 416 2014
134 sur O above, over O surreal, surrender 14.29% 77 11 66 2014
135 sy O together, with O system 0.00% 37 0 37 2014
136 syl O together, with O syllable 0.00% 7 0 7 2014
137 sym O together, with O symbol 17.31% 52 9 43 2014
138 syn O together, with O synthesis 25.69% 144 37 107 2014
139 tele O at a distance O television 50.96% 471 240 231 2014
140 trans O across, from one place to another O transatlantic, transverse 50.47% 1159 585 574 2014
141 tri O three O tricycle 60.88% 882 537 345 2014
142 twi O two O twilight 3.70% 27 1 26 2014
143 ultra O beyond, extremely O ultraviolet, ultrasonic 41.89% 740 310 430 2014
144 un N not, opposite of N unnecessary, unequal 57.26% 2251 1289 962 2012
reverse action, deprive of, release from N undo, untie
145 under B lower in grade/dignity, lesser, insufficient N underachieve 44.68% 696 311 385 2014
below, beneath O underground, underpass
146 uni O one O unicycle 42.67% 300 128 172 2014
147 up O to make something more, higher or better O upgrade 25.50% 302 77 225 2016
148 vice O deputy O vice-president 78.57% 14 11 3 2014
149 with O against O withstand 20.00% 25 5 20 2014