General and Positional Prefixes

Ab-

Away from

Ad-

Toward

Ante-

Before

Bi-

Two

Centi-

One hundred, one hundredth

Di-

Two

Diplo-

Double

Ecto-, ex-, exo-, extra-

Out, without, away

En-, endo-, end-

Within, inner

Epi-

Above, upon

Hemi-

Half, partial

Hyper-

Excessive, more than normal

Hypo-

Beneath or below normal

Infra-, sub-

Below, under

Milli-

One thousand, one thousandth

Mono-

One

Nulli-

None

Pan-

All

Para-

Near, beside, or abnormal

Per-

Through, by

Poly-

Many

Post-

After, behind

Pre-

Before

Quad-, quadri-

Four

Retro-

Behind, backwards

Semi-

Partial

Super-, supra-

Above, beyond

Sym-, syn-

Joined, together

Tetra-

Four

Trans-

Across

Tri-

Three