- unaccountable (adj.)
[unaccountable 词源字典]
- 1640s, "inexplicable," from un- (1) "not" + accountable. Meaning "not liable to be called to account" is recorded from 1640s. Related: Unaccountably; unaccountability; unaccountableness.[unaccountable etymology, unaccountable origin, 英语词源]