unaccountable

英 [ʌnə'kaʊntəb(ə)l] 美['ʌnə'kaʊntəbl]

• adj. 无责任的；莫名其妙的；不可理解的

1. not to be accounted for or explained;

"perceptible only as unaccountable influences that hinder progress"

"an unexplainable fear"

2. free from control or responsibility