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