greatest challenge
noun phraseUK /ˈɡreɪtɪst ˈtʃælɪndʒ/
US /ˈɡreɪtɪst ˈtʃælɪndʒ/
The hardest thing you have to do.
Learning to ride a bike was my greatest challenge.
RELATED WORDS
OTHER MEANINGS
2. The most important problem a group or team must solve.
Finding clean water is the greatest challenge for the village.
3. The hardest part of a game or contest.
The final level is the greatest challenge in the whole game.
4. A big test of your courage or skill.
Speaking on stage was her greatest challenge last year.