To wave a fan (or similar) to create airflow; to fan (to cool oneself or someone/something).
暑い日はうちわで扇いで涼を取る。
On hot days I fan myself with a uchiwa to cool down.
赤ちゃんが泣いているので、扇いであやした。
The baby was crying, so I soothed him by fanning him.
扇子を軽く扇いで、机の上の紙を飛ばさないでください。
Please fan gently with the folding fan so you don't blow the papers on the desk away.
To incite or stir up people's emotions or actions (often written 煽ぐ); to provoke or instigate.
彼はデマを流して人々を煽ぎ、混乱を招いた。
He spread false rumors to incite people and caused chaos.
SNSで過激な意見を投稿して世論を扇ぐ行為は危険だ。
Posting extreme opinions on social media to stir up public opinion is dangerous.
扇ぐような発言で相手を刺激してはならない。
You mustn't provoke someone with incendiary remarks.