extra-
prefix /ekstrə/, /ɪkˈstræ/
/ekstrə/, /ɪkˈstræ/
in adjectives- outside; beyond
在…之外；超出；越出 - extramarital sex
婚外性行为 - extraterrestrial beings
外星人
- extramarital sex
- (informal) very; more than usual
非常；格外；十分 - extra-thin
特别瘦 - extra-special
十分特别
More Like This PrefixesPrefixes- a-
- ante-
- anti-
- be-
- co-
- de-
- demi-
- dis-
- en-
- ex-
- extra-
- hyper-
- hypo-
- il-
- in-
- infra-
- inter-
- intra-
- mis-
- non-
- off-
- oft-
- out-
- over-
- para-
- post-
- pre-
- pro-
- re-
- retro-
- semi-
- sub-
- trans-
- ultra-
- un-
- under-
- up-
- extra-thin
词源via medieval Latin from Latin extra ‘outside’.