unwary

1. ADJ If you describe someone as unwary, you mean that they are not cautious or experienced and are therefore likely to be harmed or deceived. 不警觉的[正式] [usu ADJ n]

With its quicksands the river usually drowns a few unwary visitors every season. 这条有流沙的河每季都要淹死一些不警觉的游客。

2. N-SING The unwary are people who are unwary. 不警觉的人['the' N]

Specialist subjects are full of pitfalls for the unwary. 专业课程里充满了欺骗不警觉的人的陷阱。