challenging

[ chal-in-jing ]
/ ˈtʃæl ɪn dʒɪŋ /

adjective

offering a challenge; testing one's ability, endurance, etc: a challenging course; a challenging game.
stimulating, interesting, and thought-provoking: a challenging suggestion.
provocative; intriguing: a challenging smile.

Origin of challenging

1300–50; Middle English, as gerund; 1835–45 for def 1; see challenge, -ing2

OTHER WORDS FROM challenging

chal·leng·ing·ly, adverb non·chal·leng·ing, adjective un·chal·leng·ing, adjective

Example sentences from the Web for challengingly

British Dictionary definitions for challengingly

challenging
/ (ˈtʃælɪndʒɪŋ) /

adjective

demanding or stimulating a challenging new job