Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
effectually is an adverb meaning "in an effectual manner". It carries one recorded sense.
in an effectual manner
“Bismarck was constantly criticised by the more liberal newspapers, and he retaliated by passing an emergency decree that effectually muzzled the press”
Definitions, synonyms and semantic relations for effectually come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.