疑心

I am very doubtful of that.

我很心那件事。

He’s so suspicious he would distrust his own mother.

他这心太重, 连自己的母亲也不相信。

His suspicions were awakened.

他起了心。

They suspected an ambush.

他们心有埋伏。

He was on the fiddle for years and his boss never suspected a thing.

多年他偷偷摸摸骗了好多钱，而他老板从没起过心。