FORCEFUL
emphatic, forceful
(adjective) forceful and definite in expression or action; “the document contained a particularly emphatic guarantee of religious liberty”
forceful
(adjective) characterized by or full of force or strength (often but not necessarily physical); “a forceful speaker”; “a forceful personality”; “forceful measures”; “a forceful plan for peace”
Source: WordNet® 3.1
Etymology
Adjective
forceful (comparative more forceful, superlative most forceful)
Capable of either physical or coercive force; powerful.
Synonyms
• forcible
Antonyms
• gentle
Source: Wiktionary
Force"ful, a.
Definition: 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 Edition