警惕 (jǐng tì): Be on guard against (Verb) — Meaning & Stroke Order

When traveling in unfamiliar places, we need to be vigilant against thieves.

He was not at all on guard against the impending crisis.

Before signing the contract, be sure to watch out for any hidden unfavorable clauses.

With the flu season at its peak recently, everyone should be cautious about getting infected when going out.