Here we show you how to build your vocabulary and how to guess the meaning of new words. A prefix is added at the front of words to make new ones. Knowing the meanings of prefixes will help you to guess the meanings of words. Below are ten common prefixes, what they mean and some examples.
| Prefix | Meaning | Examples |
|---|---|---|
| anti- | against | anti-war, anti-smoking |
| co- | joint / with | cooperation, co-worker |
| dis- | opposite / not | disagree, disabled |
| ex- | former | ex-job, ex-wife |
| em- | in | employed, empowered |
| in- / il- / im- / ir- | opposite / not | illegal, irrelevant |
| mis- | wrong | misunderstand, misinform |
| post- | after | postpone, post-graduate |
| re- | again | repeat, rerun |
| un- | opposite / not /reverse | unbelievable, untie |
