say it: POW-ur-flee
powerfully is an adverb meaning "in a powerful manner". It carries 2 recorded senses.
in a powerful manner
“the federal government replaced the powerfully pro-settler Sir Godfrey Huggins with the even tougher and more determined ex-trade unionist”
in a manner having a powerful influence
“Clytemnestra's ghost crying in the night for vengeance remained most potently in the audience's mind”
Definitions, synonyms and semantic relations for powerfully come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.