(亦作e-)
1
- out表示“出”, “向外”：
exclude
excite.
2
- upward表示“向上”：
extol.
3
- thoroughly表示“完全”, “彻底”：
excruciate.
4
- denoting removal or release表示“免除”, “释放”：
excommunicate
exculpate.
5
- forming verbs which denote inducement of a state构成动词表示“激发”：
exasperate
6
- (forming nouns from titles of office, status, etc.) denoting a former state［加在表示职务身份等的名词前］表示“以前的”, “前任的”：
ex-husband
ex-convict.
USAGE
Ex- is also found assimilated as ef- before f.
词源
from Latin ex 'out of'.