■ verb
1》 make annoyed or angry.
2》 cause inflammation in (a part of the body).
3》 Biology stimulate (an organism, cell, etc.) to produce an active response.
Derivatives
~d adjective
~dly adverb
irritating adjective
irritatingly adverb
irritation noun
irritative adjective
irritator noun
Origin
C16 (earlier (ME) as irritation ), in sense 'excite, provoke': from L. irritat- , irritare '~'.