irritate

Etymology 1

From Latin irrītātus, past participle of irrītō (“excite, irritate, incite, stimulate”).

verb

1. (transitive) To provoke impatience, anger, or displeasure in.
   If thou irritatest my lord, there will come to war against thee all the Getulians, Numidians, and Garamantes, Afric contains. 1814, Signor Vestris, La Didone Abbandonata, a Serious Opera, in Two Acts. Altered from Metastasio, by Signor Vestris. As Represented at the King’s Theatre, in the Hay-Market., London: […] J. Gillet,[…], page 15
   Thou scandalizest me and irritatest my nature as much as it possibly can be irritated. 1896, Ernest Rénan, translated by Eleanor Grant Vickery, Caliban: A Philosophical Drama Continuing “The Tempest” of William Shakespeare (Publications of The Shakespeare Society of New York; No. 9), New York, N.Y.: The Shakespeare Press; London: Kegan Paul, Trench, Trübner & Co., Ltd., page 19
2. (intransitive) To cause or induce displeasure or irritation.
3. (transitive) To induce pain in (all or part of a body or organism).

Etymology 2

From Latin irritātus, past participle of irritō (“I invalidate, annul”), from irritus (“invalid”), negation of ratus (“valid, established, fixed”).

verb

1. (transitive, obsolete, Scotland, law) To render null and void.
   c. 1634-1661 John Bramhall, Protestants' Ordination Defended Are human laws presently superfluous, so often as they do not irritate or abrogate Divine laws ?