acrid

Sharp and harsh, or bitter and not to the taste.

At that instant, Eragon's back ruptured in an explosion of agony so intense, he experienced it with all five senses: as a deafening, crashing waterfall of sound; a metallic taste that coated his tongue; an acrid, eye-watering stench in his nostrils, redolent of vinegar; pulsing colors; and, above all, the feeling that Durza had just laid open his back.

Since the mid-1980s, when Indonesia first began to clear its bountiful forests on an industrial scale in favour of lucrative palm-oil plantations, “haze” has become an almost annual occurrence in South-East Asia. The cheapest way to clear logged woodland is to burn it, producing an acrid cloud of foul white smoke that, carried by the wind, can cover hundreds, or even thousands, of square miles.

Causing heat and irritation.

The bombardier beetle sprays acrid secretions to defend itself.

Caustic; bitter; bitterly irritating.

That man has an acrid temper.

In a chaotic, 90-minute back-and-forth, the two major party nominees expressed a level of acrid contempt for each other unheard-of in modern American politics.