警戒 jǐngjiè to warn
to warn; to alert; to be on the alert; to stand guard; sentinel
怎么记住“警戒”: 警 guard + 戒 to warn = to warn.
汉字
用法
- To stand guard / keep watch, and to be on alert - 加强警戒 (jiāqiáng jǐngjiè) tighten security/watch; 警戒线 (jǐngjiè xiàn) a cordon/警戒 line.
- More external and military than 警惕 (jǐngtì, inner mental vigilance): 警戒 implies posted guards and physical watch.
- Formal register.