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abstention (from voting); renunciation (of a right); withdrawal (from a contest)
彼は健康上の理由で試合を棄権した。
He withdrew from the match for health reasons.
投票を棄権する国民が増えている。
The number of citizens abstaining from voting is increasing.
怪我のため決勝戦を棄権せざるを得なかった。
Due to injury, I had no choice but to withdraw from the finals.