difference between Daunting and Challenging

chal·leng·ing adj.
1. Calling for full use of one's abilities or resources in a difficult but stimulating effort:
a challenging course of study; a challenging role for an inexperienced performer.
2. Absorbing; intriguing:
a challenging idea.

daunt (dônt, dänt)
tr.v. daunt·ed, daunt·ing, daunts
To abate the courage of; discourage. See Synonyms at dismay.