yell of encouragement; cheering
Used for shouts of support, especially in school sports contexts. Often heard in phrases like エールを送る (send a cheer) or エールを交換する (exchange cheers).
We sent cheers to the players.
The cheering squads exchanged yells.
The team members cheered on the players before the match.
Before the game, the cheering squads of both schools exchanged cheers.
ブーイング is booing to show disapproval, the opposite of エール, which is a supportive cheer.
Borrowed from English 'yell', adapted into Japanese with a meaning focused on encouragement and cheering, especially in school sports.