foot fault
US /ˈfʊt fɔːlt/
UK /ˈfʊt fɔːlt/

1.
풋 폴트, 발 반칙
an instance of a player serving in tennis or volleyball touching or crossing the baseline with their foot before hitting the ball
:
•
The umpire called a foot fault on the player, costing them the point.
심판은 선수에게 풋 폴트를 선언하여 점수를 잃게 했다.
•
To avoid a foot fault, make sure your feet stay behind the line when serving.
풋 폴트를 피하려면 서브할 때 발이 선 뒤에 있어야 해.