expression, godan verb (-ru)
stimulate interest; arouse curiosity; pique one's interest
Used when something catches one's attention or makes one want to know more. Often in the form 気をそそられる (passive).
その本のタイトルに気をそそられた。
The title of that book piqued my interest.
その謎めいた広告は人々の気をそそる。
The mysterious advertisement piques people's interest.