| Noun | 1. | forcefulness - physical energy or intensity; "he hit with all the force he could muster"; "it was destroyed by the strength of the gale"; "a government has not the vitality and forcefulness of a living man"brunt - main force of a blow etc; "bore the brunt of the attack" momentum, impulse - an impelling force or strength; "the car's momentum carried it off the road" | |