Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
self-abnegation is a noun meaning "renunciation of your own interests in favor of the interests of others". It carries one recorded sense.
renunciation of your own interests in favor of the interests of others
Definitions, synonyms and semantic relations for self-abnegation come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.