challenge [challenged, challenging, challenges](to invite someone to take part in a competition) verb [UK: ˈtʃæ.ləndʒ] [US: ˈtʃæ.ləndʒ]I want a challenge. = Quiero un desafío.
dare [dared, daring, dares](to defy or challenge) verb [UK: deə(r)] [US: ˈder]I dare you to try to stop me. = Te desafío a que intentes pararme.
defy [defied, defying, defies](to challenge (someone)) verb [UK: dɪ.ˈfaɪ] [US: də.ˈfaɪ]I defy you to make it public. = Te desafío a hacerlo público.
take on(To attempt to fight or compete) verb [UK: teɪk ɒn ˈsʌm.bə.di] [US: ˈteɪk ɑːn ˈsʌm.ˌbɑː.di]