- \ \  Etymologically, a carpenter is a ‘maker of carriages’. The word comes, via Anglo-Norman carpenter, from late Latin carpentārius, originally an adjective derived from carpentum ‘two-wheeled vehicle’. This, like the similar and perhaps related Latin carrus, source of English car, was of Celtic origin. The generalization in meaning to ‘worker in wood’ took place before the word was borrowed into English.
Word origins - 2ed. J. Ayto. 2005.