Etymology
Advertisement

irritant (adj.)

1630s, from Latin irritantem (nominative irritans), present participle of irritare "to excite, provoke" (see irritate). As a noun, "that which irritates," from 1802.

Advertisement
Advertisement
Definitions of irritant

irritant (n.)
something that causes irritation and annoyance;
Synonyms: thorn
From wordnet.princeton.edu