The new data 'challenges' many old assumptions. [=the new data gives people reasons to doubt many old assumptions]
He hopes to be the governor's 'challenger' in the next election. [=the candidate running against the governor]
The coach is confident that you will 'rise to the challenge'. [=the coach is confident that you will succeed]
(..) (COOING) Aw... Ow! JUNIOR: It wasn't always easy. Oh... - (GRUNTING) - JUNIOR: This was our challenge. This was our sacred duty. No matter how tough or impossible or brutal or harsh or inhumane or savage, we would triumph over adversity. (MU FFLED SCREAMING) (..)2016 Storks