1640s, "inexplicable," from un- (1) "not" + accountable. Meaning "not liable to be called to account" is recorded from 1640s. Related: Unaccountably; unaccountability; unaccountableness.
雙語例句
1. For some unaccountable reason, it struck me as extremely funny.
不知道為什么，我覺得這極其滑稽。
來自柯林斯例句
2. He had an unaccountable change of mind.
他莫名其妙地改變了主意。
來自柯林斯例句
3. For some unaccountable reason, the letter never arrived.
不知何故，那封信始終未寄到。
來自《權(quán)威詞典》
4. An insane person is unaccountable for his actions.