forcefulness
US /ˈfɔːrs.fəl.nəs/
UK /ˈfɔːrs.fəl.nəs/

1.
forza, energia, incisività
the quality of being strong, assertive, or effective in action or expression
:
•
The forcefulness of his argument convinced everyone.
La forza del suo argomento ha convinto tutti.
•
She spoke with great forcefulness, leaving no room for doubt.
Parlò con grande forza, non lasciando spazio a dubbi.