Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
scarily is an adverb meaning "in an alarming manner". It carries one recorded sense.
in an alarming manner
“the disturbing thing about the Minister's behavior is that far from being artificial, it too often rings frighteningly true”
Definitions, synonyms and semantic relations for scarily come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.