legerdemain
noun /ˈledʒədəmeɪn/
  /ˈledʒərdəmeɪn/
(from French, formal) (also sleight of hand)
 [uncountable]- movements of your hand that are done with skill so that other people cannot see themWord Originlate Middle English: from French léger de main ‘dexterous’, literally ‘light of hand’.