An intrigue.
"The book was an intriguing tale filled with secret plots and mysterious alliances."
present participle of intrigue
"The secret meetings between the spies were full of intrigue as they plotted their next move."
In plain English: Nothing, because intriguing is an adjective not a verb and cannot be used as an action word.
"The detective was intrigued by the mysterious clue found at the crime scene."
capable of arousing interest or curiosity
"our team came up with some most intriguing finds"
Causing a desire to know more; mysterious.
"The detective found the old map in the attic intriguing because it seemed to point toward a hidden treasure that no one had ever discovered."
In plain English: Something intriguing is interesting enough to make you want to know more about it right away.
"The detective found an intriguing clue hidden in the old book."
Usage: Use "intriguing" to describe something that sparks curiosity, but avoid using it as a synonym for simply being interesting or entertaining. It specifically implies an element of mystery or puzzle rather than general amusement.