Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
phlegmatical is an adjective meaning "showing little emotion". It carries one recorded sense.
showing little emotion
“a phlegmatic...and certainly undemonstrative man”
Definitions, synonyms and semantic relations for phlegmatical come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.