Prefix

Meaning/use

Examples


Un- (verb/adjective)

Negative/Opposite

To undo, unable, unappreciation

In- (+adjective)


Opposite

Independent, inexperienced

Il- (+adjective)

Illegal, illegible, illiterate

Im- (+adjective)

Impossible, impolite, immoral

Ir- (+adjective)

Irregular, irresponsible

Inter-(+adjective)

between

intercontinental

Dis- (verb/noun)

Negative/opposite

Dislike, disappear, disbelief

Mis- (+verb)

Wrongly/badly

Misunderstand 

Re- (+ verb)

Do again

Redo, rewrite, rebuild

Semi- (+noun/adjective)

Half, partly

Semi-circle, semi-literate

Sub- (+noun/adjective)

Under, less/lower, below

Sub-committee

Ex- (+noun)

Previous

Ex-husband, ex-president

De- (+verb/noun)

Opposite, remove, reduce

Devalue, decentralize

Co- (+noun/verb)

Together

Cooperation, co-worker

Anti- (+noun/adjective)

Against, opposite

Anti-European, antisocial

Post- (+noun/verb)

After

Postgraduate 

Pre- (+noun/verb)

Before

Prearrangement 

Multi- (+noun/adjective)

Many

Multi-purpose

Over- (+verb)

Too much

Overcrowded, oversleep

Under- (+verb)

Not enough, too little

undercharge