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