(of a person) possessing physical strength and weight; rugged and powerful. Synonyms:brawny, muscular, powerful, sinewy."A muscular boxer" , "Powerful arms"
2.
Of considerable weight and size.
3.
Large in amount or extent or degree. Synonyms:goodish, goodly, healthy, respectable, sizable, sizeable, tidy."A goodly amount" , "Received a hefty bonus" , "A respectable sum" , "A tidy sum of money" , "A sizable fortune"
... retorted Shad. "Probably it's the only chance he's ever had to meditate on his misdoings. Don't you fret about him. He's just as husky as I be, and twice as hefty. It was all I could do to ketch a good ... — Kit of Greenacre Farm • Izola Forrester