uncharacteristic

It was highly uncharacteristic of the punctual CEO to be late for the most important board meeting of the year.

(Chinese) 对于一向准时的首席执行官来说，在年度最重要的董事会上迟到是非常反常的。

The dog's sudden aggression was uncharacteristic, as it had always been known for its gentle and friendly nature.

(Chinese) 这只狗突然表现出的攻击性很不寻常，因为它一直以温柔友好的本性著称。