IPA: /ˈfʊtˌfɔlt/
KK: /ˈfutˌfɔlt/
A mistake made in tennis when the server does not keep both feet behind the starting line before hitting the ball.
The player lost the point due to a footfault during the serve.
Footfault → The word is formed from 'foot' (from Old English 'fōt', meaning the lower extremity of the leg) and 'fault' (from Old French 'faulte', meaning a mistake or error). A footfault refers to a mistake made with the foot, particularly in sports like tennis, where a player steps on or over the line during a serve.
Think of a 'foot' being involved in a 'mistake' ('fault') — that's why a footfault is a mistake made with the foot.