Usages

• 警笛 : siren
• 警戒 : to warn | to be alert for
• 警告 : to warn | to admonish
• 警句 : aphorism
• 警力 : (n) police force
• 警觉 : vigilance
• 警卫 : (security) guard
• 警钟 : alarm bell
• 警方 : police
• 武警 : armed police
• 警备 : guard | garrison
• 警讯 : police call
• 警车 : police vehicle
• 警官 : constable | police officer
• 报警 : report (an incident) to the police | give an alarm
• 警报 : (fire) alarm | alert signal | alarm | alert | warning
• 警察 : police | policeman | policewoman
• 警犬 : police dog
• 警惕 : vigilant | alert | on guard | to raise one's guard
• 虚警 : false alert
• 巡警 : police officer
• 预警 : warning | early warning