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-deceit is a noun meaning "a misconception that is favorable to the person who holds it". It carries one recorded sense.
a misconception that is favorable to the person who holds it
Definitions, synonyms and semantic relations for self-deceit come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.