defy
1. de.fy \di-'fi-\ vt [ME defyen to renounce faith in, challenge, fr. OF defier, fr. d]e- + fier to entrust, fr. (assumed) VL fidare, alter. of L fidere to trust archaic 1: to challenge to combat 2: to goad into trying to perform something proposed as impossible 3: to confront with assured power of resistance {~ public opinion)> 2. de.fy \di-'fi-, 'de--.fi-\ n : CHALLENGE, DEFIANCE