›something needing great mental or physical effort in order to be done successfully, or the situation of facing this kind of effort: [C]It’s a challenge being in a marriage when both partners have high-pressure jobs.[C]No matter how long you write, poetry remains a challenge.[C]Germany faces broad challenges in the coming years.challenging
/ˈtʃæl·ən·dʒɪŋ/adj›For a reporter, covering the White House is a challenging assignment.