活口 Traditional form: 活口 Pinyin (reading): huókǒu Definitions: sb who witnesses a crime and is not killed by the perpetrator a captive who can provide information Characters: 活 - to exist, to live, to survive; living, working 口 - mouth; entrance, gate, opening Traditional characters: 活 - to exist, to live, to survive; living, working 口 - mouth; entrance, gate, opening