abnegation

noun

1 to ignore these issues would be a serious abnegation of their responsibilities:

renunciation, rejection, refusal, abandonment, abdication, surrender, giving up, relinquishment, abjuration, repudiation, denial, eschewal, disavowal, casting aside.

▷antonyms acceptance.

2 such people are capable of abnegation and unselfishness:

self-denial, self-sacrifice, abstinence, temperance, continence, asceticism, abstemiousness, austerity, renunciation, resignation.

▷antonyms self-indulgence.

abnegation Oxford Dictionary of English