Daily Chinese Idiom Guessing Game
Suspicious appearance or behavior; someone or something that seems shady or dubious.
举动和神色值得怀疑。
清·蒲松龄《聊斋志异·房文淑》邓以形迹可疑，故亦不敢告人，托之归宁而已。”
The man loitering near the bank was acting suspiciously, so the guard called the police.