corpulent
Concise Oxford English Dictionary © 2008 Oxford University Press:
corpulent /ˈkɔːpjʊl(ə)nt/
▶adjective (of a person) fat.
– derivatives
corpulence noun,
corpulency noun.
corpulence noun,
corpulency noun.
– origin ME: from L. corpulentus, from corpus ‘body’.
'corpulent' also found in these Oxford entries:

