The definition of brawn means developed muscles, or physical strength.
Strength or power of any degree
(Informal) Power or influence, esp. when based on force or threats of force
The energy or motive force by which a physical system or machine is operated:
The high-jump component of the sport of show jumping.
Cogency or persuasiveness:
Find another word for powerfulness. In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for powerfulness, like: brawn, might, muscle, potence, potency, power, puissance, sinew, strength, thew and strong.