Definition
- C2
To be vigilant and cautious in order to avoid being deceived or placed in a dangerous situation.
警惕，提防
You must be on your guard when talking to strangers.
與陌生人交談時，你必須保持警惕。
When investing, you should be careful and always be on your guard so that you don't get scammed.
投資時，你應該謹慎並時刻保持警惕，以免被詐騙。
Make sure to be on your guard while walking alone at night.
夜間獨自走路時，一定要保持警惕。