1. be wary of : 提防；
形容词
1. 小心的;提防的
If you are wary of something or someone, you are cautious because you do not know much about them and you believe they may be dangerous or cause problems.
1. marked by keen caution and watchful prudence
e.g. they were wary in their movements
a wary glance at the black clouds
taught to be wary of strangers
2. openly distrustful and unwilling to confide
Synonym: leerymistrustfulsuspiciousuntrusting