adjective, heft·i·er, heft·i·est.
heavy; weighty: a hefty book.
big and strong; powerful; muscular: a hefty athlete.
impressively large or substantial: a hefty increase in salary.
Origin of hefty
Synonyms for hefty
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
adjective heftier or heftiest informal
big and strong
characterized by vigour or forcea hefty blow
large, bulky, or heavy
sizable; involving a large amount of moneya hefty bill; a hefty wage
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper