Prefixes

A

a-

1. in, on, at, toward

2. in the state of

3. at such time as

4. in the process of

5. ab-

6. an- (definition 1)

ab- / abs-

1. from

2. away from

3. outside of

ac-

1. to, toward

2. near

3. tendency

4. addition

acantho-

having thorns

acousto-

acoustic

acro-

1. sharp

2. tip

3. extreme

4. peak

actino-

1. radial

2. ray

3. actinic radiation

ad-

1. to, toward

2. near

3. tendency

4. addition

adipo-

fat, relating to fat

aeolo-

in continuous change

musical instruments with vibrating reeds

aequi-

1. equal

2. balanced

3. identical

aero-

1. air

2. aircraft

aesthesio-

1. sensation

2. perception

aft-

at or near the back or rear

after-

coming after or later

having contrary or remote effect

having a hindrance or inferiority

again-

1. again

2. against

3. back

4. in return

agri- / agro-

agriculture

ailuro-

cats

akro-

1. sharp

2. tip

3. extreme

4. peak

al-

(Arabic) definite article

aleuro-

wheat flour

algo-

pain

algae

all-

1. completely

2. absolutely

3. generally

allo-

other, variant

alt- / alter-

1. alternative, other

2. (Germanic) old, ancient

alto-

high

ambi-

1. both

2. around

amelo-

relating to tooth enamel

ammo-

sand

ampelo-

vine, grape

amphi- / ampho-

1. both

2. near

amylo-

starch

an-

1. not

2. opposite

3. without

4. (Scottish) on, at, toward, upon

ana-

1. up

2. on

3. again

4. excessive

5. backward

6. each by itself

andro-

male

anemo-

wind

aniso-

unequal

ankylo-

1. bent, crooked

2. stiff

3. fused

ant-

1. ante-

2. anti-

ante- / antero-

1. prior to

2. in front of

3. anterior

anti-

1. against

2. hostile to

3. contrasting

4. opposite to

5. counter to

antho-

flowers

anthro- / anthropo-

1. human

2. humanity

anxio-

anxiety

apeiro-

infinite

apico-

1. apex

2. the tip of the tongue

3. the root of a tooth

apo-

1. away from

2. separate

3. without

4. derived from

5. related to

après-

after

aqua- / aque-

water

arachno-

1. spiders

2. arachnids

archi- / archo-

1. chief, primary

2. first, original

3. highest

4. extremely, intensely

archaeo- / archaio-

1. ancient

2. primitive

areno-

sand

areo-

Mars

argento-

silver

argyro-

silver

aristo-

best

arithmo-

1. numbers

2. arithmetic

arterio-

arteries

arthro-

1. joints

2. articulations

as-

away from

astheno-

weakness

astragalo-

the anklebone

astro-

1. stars

2. celestial bodies

3. space

at-

1. at, close to

2. away, off

audio-

sound

auri-

gold

auro-

1. noise

2. gold

auto-

1. relating to oneself

2. automatic

auxo-

growth, increase

avi-

bird, flight

avo-

grandfather

axi- / axo-

relating to an axis