Collins Chinese Dictionary Plus (3rd edition), 2011:
疑心 yíxīn
I 名
suspicion
II 动
suspect
- 她疑心邻(鄰)居偷了她的手表(錶)。 Tā yíxīn línjū tōule tā de shǒubiǎo. She suspected that her neighbour 或 neighbor stole her watch.