Prefixes

Are letters which we add to the beginning of a word to make a new word with a different meaning. Prefixes can, for example, create a new word opposite in meaning to the word the prefix is attached to. They can also make a word negative or express relations of time, place or manner.

examples

base word

-possible
-able
-payment
-war
-terrestrial
-cook

prefixed word

-impossible
-unable
-non-payment
-pre-war
-extraterrestrial
-overcook

I’m sorry I was unable to attend the meeting.

Non-payment of fees could result in a student being asked to leave the course.

Has anyone ever really met an extraterrestrial being? (meaning a being from another planet)

The meat was overcooked and quite tasteless.