This is the 286th most frequent Chinese word.
警
"警" means "alert," "warning," or "police."
Here '警' is used in the phrase '警惕', meaning 'vigilance', indicating a state of being alert.
我们需要提高警惕。
We need to raise our vigilance.
Here '警' is part of '警报', meaning 'alarm', indicating a system for alerting or warning of danger.
这个社区装了新的警报系统。
The community has installed a new alarm system.
Here '警' is used as part of the word '警察', meaning 'police', indicating an association with law enforcement.