TREADLE Meaning of TREADLE in English [ 'trɛd(ə)l ]■ noun a lever worked by the foot and imparting motion to a machine. ■ verb operate by a ~.OriginOE tredel 'stair, step' (see tread ). Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004