chivalry: [13] Etymologically, chivalry is the practice of riding horses. It comes from Old French chivalerie, a derivative of medieval Latin caballārius (related to, and perhaps direct source of, English cavalier). This meant ‘horseman’, and was formed from Latin caballus ‘horse’ (whence French cheval). The meaning of chivalerie had two main strands, both of them adopted into English: on the one hand ‘mounted soldiery’ (a sense superseded by the related cavalry), and on the other ‘knightly behaviour’. => cavalier, cavalry
