Focus on the pronunciation of challenge
English definition of “challenge”
/ˈtʃæl·əndʒ/ n [C/U] (DIFFICULT JOB)
› 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.