having an extremely bad smell
fetid - stinking
Something ‘fetid’ does more than just smell. It stinks, and implies something harsh, rotting, or toxic that to breathe in would be extremely unpleasant. This formal word is almost always used in reference to something related to the air or water. Has strongly negative connotations.
The whole factory was rundown and filthy, with fetid pools of stagnant water gathered sporadically on the ground.
I could smell the fetidness of the river in the air. It was obvious that it had been badly polluted over the years.
Since Adam lost his job, he’s been living in a squalid, fetid hellhole in one of the roughest parts of town.