1. (adj) brawny, hefty, muscular, powerful, sinewy
(of a person) possessing physical strength and weight; rugged and powerful
Synonyms: brawny, potent, powerful, unchewable, sizable, sizeable, stringy, hefty, fibrous, healthy, mesomorphic, tendinous, respectable, sinewy, knock-down(a), goodly, goodish, herculean, muscular, tidy
Antonyms: weak, inconsiderable, light
2. (adj) hefty
of considerable weight and size
Synonyms: muscular, respectable, goodish, goodly, brawny, healthy, sinewy, powerful, sizeable, tidy, sizable
Antonyms: inconsiderable, weak, light
3. (adj) goodly, goodish, healthy, hefty, respectable, sizable, sizeable, tidy
large in amount or extent or degree
Synonyms: levelheaded, good, brawny, powerful, honorable, sizable, sound, kempt, sizeable, hefty, healthy, salubrious, respectable, sinewy, ample, intelligent, estimable, goodly, goodish, level-headed, muscular, tidy, good for you(p)
Antonyms: light, weak, inconsiderable
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Synonyms for hefty 
