abnegation, self-abnegation, denial, self-denial, self-renunciation

renunciation of your own interests in favor of the interests of others

• renunciation, forgoing, forswearing — the act of renouncing; sacrificing or giving up or surrendering (a possession or right or title or privilege etc.)
• selflessness, self-sacrifice — acting with less concern for yourself than for the success of the joint activity