the abdomen, or belly; esp., a large, protruding belly; potbelly
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'paunch'ME paunche < MFr panche < L pantex (gen. panticis), belly < IE base *pank-, to swell > Russ puk, a bundle