From Old French ruse ('dodging, trick'), a noun from ruser ('to dodge, drive back, deceive'), probably from Latin recusare ('to refuse, push back, make an objection'), from re- + causare ('to cause, plead'). The earliest English use (c. 1425) was as a hunting term for the dodging movements of a pursued animal. The modern figurative sense of 'a cunning trick' is recorded from the 1620s.