可疑 (kě yí): suspicious; dubious

Late last night, a suspicious man appeared in the neighborhood. He was wearing a hat and stopped in front of every building to look around, so the security guard immediately called the police.

When the teacher was grading the exams, she found that two answer sheets were exactly the same, even the mistakes were identical. She found this very suspicious and called the two students to the office for questioning.

He received a text message saying that suspicious transactions had appeared on his bank card and that he needed to click a link to confirm. He remembered similar scams reported in the news and ignored it.

When the police were investigating the theft, they discovered that the warehouse surveillance video had suddenly cut off a few minutes before the crime. This suspicious detail made them suspect that an insider was involved.

She met a friend online who always found various excuses to borrow money from her but never made video calls. Her friend reminded her that such suspicious behavior was very likely a scam.