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-restraint is a noun meaning "exhibiting restraint imposed on the self". It carries one recorded sense.
exhibiting restraint imposed on the self
“an effective temperateness in debate”
Definitions, synonyms and semantic relations for self-restraint come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.