Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
familiarised is an adjective meaning "having achieved a comfortable relation with your environment". It carries one recorded sense.
having achieved a comfortable relation with your environment
Definitions, synonyms and semantic relations for familiarised come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.