Forceful
Pronunciation : Force"ful
Part of Speech : a.
Definition : Defn: Full of or processing force; exerting force; mighty. -- Force"ful*ly, adv. Against the steed he threw His forceful spear. Dryden.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder