suspicion/suspicious/suspiciously

suspicion /səsˈpiʃən/ n. ［c］ & ［u］怀疑：be above suspicion 不容怀疑，靠得住；be/fall/remain under suspicion 受到怀疑；reinforce one’s suspicion使人更加怀疑 I have a suspicion that she is not telling the truth. 我怀疑她没说真话。There are no grounds for suspicions of their motives. 怀疑他们的动机是没有根据的。His behaviour aroused no suspicion. 他的举动没有引起怀疑。

suspicious /səsˈpiʃəs/ adj. 1.猜疑的，疑心的（of）：He was suspicious of all his neighbours. 他对所有的邻居都猜疑。I am suspicious of his motives. 我对他的动机表示怀疑。［考句］The police are suspicious of his words because he already has a record.因为他有前科，警察怀疑他的供词。2.可疑的： There is something suspicious about it. 那有点儿可疑。Her behaviour was very suspicious.她的行为十分令人怀疑。

suspiciously adv. 令人怀疑地