To imagine to exist; surmise.

揣测；猜想有；疑有。

To believe in the possible guilt of, without having proof.

怀疑(但无证据)。

To doubt; mistrust.

怀疑；不信。

To imagine something as possible, esp. evil; b suspicious.

怀疑；觉得可疑。

A person believed, but not proved, to be guilty of some crime.

嫌疑犯。