अर्थ : Requiring full use of your abilities or resources.
उदाहरणे :
Ambitious schedule.
Performed the most challenging task without a mistake.
समानार्थी : ambitious
अर्थ : Stimulating interest or thought.
उदाहरणे :
A challenging hypothesis.
A thought-provoking book.
समानार्थी : thought-provoking