1640s, from Latin rancidus "rank, stinking, offensive" (also source of Italian rancido, Spanish rancio), from rancere "be spoiled or rotten," of unknown origin. German ranzig is from French rancide. Related: Rancidness.
rancid butter
rancid bacon
ramus
ran
ranch
rancher
ranchero
rancid
rancor
rancorous
rancour
rand
Randal