unaccountableadj.
英 ʌnə'kaʊntəb(ə)l | 美 'ʌnə'kaʊntəbl
中文adj. 无责任的；莫名其妙的；不可理解的
词根词源
unaccountable (adj.)1640s, "inexplicable," from un- (1) "not" + accountable. Meaning "not liable to be called to account" is recorded from 1640s. Related: Unaccountably; unaccountability; unaccountableness.
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