'anesthetizer' originates from English, specifically from the verb 'anesthetize' plus the agent suffix '-er', where 'anesthetize' means 'to administer anesthesia'.

'anesthetizer' was formed in English by adding '-er' to 'anesthetize', which itself comes from 'anesthesia' (from Greek 'anaisthēsia', meaning 'lack of sensation').

Initially, it meant 'one who administers anesthesia', and this meaning has remained consistent in modern usage.