Thought-provoking (adjective)

Stimulating or encouraging thought or reflection; intellectually stimulating.

Origin:

Compound of "thought" and "provoking".

Examples:

1. This book is thought-provoking and will challenge your beliefs.
2. The lecture was thought-provoking and sparked many questions.
3. The artwork is thought-provoking, making you question the artist's intentions.
4. This movie is thought-provoking and will stick with you long after the credits roll.
5. His speech was thought-provoking, leaving the audience with much to ponder.