"heftiest" in the adjective sense
1. brawny, hefty, muscular, powerful, sinewy
of a person) possessing physical strength and weight rugged and powerful
"a hefty athlete"
"a muscular boxer"
"powerful arms"
2. hefty
of considerable weight and size
"a hefty dictionary"
3. goodly, goodish, healthy, hefty, respectable, sizable, sizeable, tidy
large in amount or extent or degree
"it cost a considerable amount"
"a goodly amount"
"received a hefty bonus"
"a respectable sum"
"a tidy sum of money"
"a sizable fortune"
Source: WordNet® (An amazing lexical database of English)
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