Summary: Prefixes are key morphemes in English vocabulary that begin words. The prefix *ex-*, with its variants *e-* and *ec-*, mean "out." Examples using this prefix include [*ex*]ceed, [*e*]ject, and [*ec*]centric. An easy way to remember that the prefix *ex-* means "out" is through the word [*ex*]it, for when you [*ex*]it a room, you go "out" of it.
