Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
initiatory is an adjective meaning "serving to set in motion". It carries one recorded sense.
serving to set in motion
“the magazine's inaugural issue”
“the initiative phase in the negotiations”
“an initiatory step toward a treaty”
“his first (or maiden) speech in Congress”
“the liner's maiden voyage”
Definitions, synonyms and semantic relations for initiatory come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.