watchful
UK/'wɒtʃful/US
A1
Definitions
adj.
Closely observant and alert; vigilant and on guard against danger or problems.
注意的，警惕的，警觉的
Root Breakdown
Native Englishwatchfulother
=watchful
Example Sentences
- 1.
The watchful guard noticed the suspicious figure immediately.
- 2.
Parents must be watchful of their children online.