self-abnegation

noun2

1. •
   The denial or invalidation of one's own needs, interests, etc. for the sake of another's; the setting aside of self-interest.

   • [Self commendation] should bee accompanied with Self-abnegation, or a renouncing of all Self-conceit, Self-sufficiency, Self seeking, or Self worthiness; to prick the bladder of pride in us. — 1656
2. •
   An act of self-denial.

   • […] self-abnegations often repeated imply on the part of the actor a tacit ascription of relative selfishness to others who profit by the self-abnegations. — 1879