say it: HEF-tee
hefty is an adjective meaning "(of a person) possessing physical strength and weight; rugged and powerful". It carries 3 recorded senses.
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”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for hefty come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.