Prefixes

Ab-

Away from

Ad-

Towards

Dys-

Difficult, painful, bad

Eu-

Good, easy, normal

Endo

Within, inside

Ex- or exo-

Without, out of, outside, away from

Ecto-

Outside

Hyper-

Increased, more than normal

Hypo-

Decreased, less than normal

Inter-

Between

Intra-

Within

Poly-

Many

Oligo-

Scant or little

Pre-

Before

Post-

After

Sub-

Below, under, less

Super- or supra-

Above, beyond excessive

A- or An-

Without or no

Anti-

Against

Brady-

Abnormally slow

Contra-

Against, opposed

De-

Remove, take away, loss of

Dia-

Through, apart, across, between

Dis-

Reversal, separation

Dys-

Painful, difficult, bad

Epi-

Above

Hyper-

Excessive, abnormally high

Hypo-

Insufficient, abnormally low

Mal-

Poor, bad

Path/o

Disease

Poly-

Many, much, multiple

Py-

Pus

Tachy-

Abnormally rapid

Ankyl/o-

Bent, looped, fused

Auto-

Self

Bi-

Two, double, twice

Crypt/o

Hidden, concealed, depression on a surface

Infra-

Below, beneath

Inter-

Between

Intra-

Within

Lith/o

Stone, calculus

Megal/o or mega-

Abnormally large

Necr/o

Dead, decaying

Neo/o

New, recent

Phag/o

Eating, swallowing

Pseud/o

False

Scler/o

Hardening

Sub-

Under, beneath