(bound form) the police; an officer of the law; a short form for 警察 jǐng​chá

(bound form) to warn; to caution; to admonish so as to alert others to danger or mistakes

(bound form) an alarm; a warning signal or report of an emergency; an urgent situation

(bound form) to be on the alert; to guard against possible danger or emergencies

(bound form) alert; vigilant; quick-witted

a Chinese surname

(bound form) concise and impactful, especially of language or writing