exterminatorn.
英 ɪk'stɜːmɪneɪtə | 美 ɪk'stɝmə,netɚ
中文n. 根除者；（美）灭鼠药；（美）职业的消灭害虫者
词根词源
exterminator (n.)c. 1400, "an angel who expells (people from a country)," from Late Latin exterminator, from past participle stem of Latin exterminare (see exterminate). As a substance for ridding a place of rats, etc., by 1848; as a person whose job it is to do this, by 1938.
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