1
[ adjective ] requiring full use of your abilities or resources

Synonyms

ambitious

Examples

"ambitious schedule" "performed the most challenging task without a mistake"

Used in print

(Guy Bolton, The Olympians....)

Pausing in the doorway he said : `` The form of the human female , unlike her mind and her spirit , is the most challenging loveliness in all nature '' .

Related terms

difficult

2
[ adjective ] stimulating interest or thought

Examples

"a challenging hypothesis" "a thought-provoking book"

Related terms

stimulating

3
[ adjective ] disturbingly provocative

Synonyms

intriguing

Examples

"an intriguing smile"

Related terms

provocative

*