- extroversion (n.)
[extroversion 词源字典]
- mid-17c., "condition of being turned inside out," noun of action from obsolete verb extrovert (v.) "to turn inside out," from extro- + Latin vertere (see versus). Earliest as a word in mysticism; modern use in psychology attested by 1920.[extroversion etymology, extroversion origin, 英语词源]