unwary

不警觉的、不谨慎的、粗心的

Unwary tourists are often overcharged by taxi drivers here.

不够警觉的观光客在这里常被计程车司机超收车资。

容易上当的、易受骗的

The scam is designed to trap unwary online shoppers.

这种骗局专门用来坑那些容易上当的网购族。

粗心的人、不警觉的人常与 the 连用

The steep cliff path holds many dangers for the unwary.

这条陡峭的崖边小径对粗心的人来说危机重重。