forfeit|forfeited|forfeiting

他因为迟到而不得不放弃比赛资格。

He had to ___forfeit his chance to compete because he was late.

他因违反规则而失去了比赛资格。

He ___forfeited his chance to compete by breaking the rules.

他因违反公司规定而不得不放弃年终奖金。

He ended up ___forfeiting his year-end bonus for breaking company rules.