I. LATIN PREFIXES.

A, ab, abs—­signify from or away; as, a-vert, to turn from; ab-ject, to throw away; abs-tract, to draw away.

Ad—­to or at; as, ad-here, to stick to; ad-mire, to wonder at.

Ante—­means before; as, ante-cedent, going before.

Circum—­signifies round, about; as, circum-navigate, to sail round.

Con, com, co, col—­together; as, con-join, to join together; com-press, to press together; co-operate, to work together; col-lapse, to fall together.

Contra—­against; as, contra-dict, to speak against.

De—­from, down; as, de-duct, to take from; de-scend, to go down.

Di, dis—­asunder, away; as, di-lacerate, to tear asunder; dis-miss, to send away.

E, ef, ex—­out; as, e-ject, to throw out; ef-flux, to flow out; ex-clude, to shut out.

Extra—­beyond; as, extra-ordinary, beyond what is ordinary.

In, im, il, ir—­(in, Gothic, inna, a cave or cell;) as, in-fuse, to pour in.  These prefixes, when incorporated with adjectives or nouns, commonly reverse their meaning; as, in-sufficient, im-polite, il-legitimate, ir-reverence, ir-resolute.

Inter—­between; as, inter-pose, to put between.

Intro—­within, into; intro-vert, to turn within; intro-duce, to lead into.

Ob, op—­denote opposition; as, ob-ject, to bring against; op-pugn, to oppose.

Per—­through, by; as, per-ambulate, to walk through; per-haps, by haps.

Post—­after; as, post-script, written after; post-fix, placed after.

Prae, pre—­before; as, pre-fix, to fix before.

Pro—­for, forth, forward; as, pro-noun, for a noun; pro-tend, to stretch forth; pro-ject, to shoot forward.

Praeter—­past, beyond; as, preter-perfect, pastperfect; preter-natural, beyond the course of nature.

Re—­again or back; as, re-peruse, to peruse again; re-trade, to trade back.

Retro—­backwards; as, retro-spective, looking backwards.

Se—­aside, apart; as, se-duce, to draw aside.

Sub—­under; as, sub-scribe, to write under, or sub-sign.

Subter—­under; as, subter-fluous, flowing under.

Super—­above or over; as, super-scribe, to write above; super-vise, to overlook.

Trans—­over, beyond, from one place to another; as, trans-port, to carry over; trans-gress, to pass beyond.

II.  GREEK PREFIXES.