Englishrancid
adjective
the smell of rancid butter:
sour, stale, turned, rank, putrid, foul, rotten, bad, off, old, tainted;
gamy, high, fetid, stinking, malodorous, foul-smelling, evil-smelling;
unpleasant, noxious, revolting, nasty, sickening, offensive;
literary noisome, mephitic;
rare miasmic, miasmal, olid.
▷antonyms fresh.
rancid Oxford Dictionary of English