irritation

Etymology

It is inherited from Middle English irritacion,^[2] borrowed from Latin irrītātiō (“incitement, stimulus; irritation, anger”),^[2][3][4] partly through Old French irritacion,^[2][3] a noun of action from irrītātus, the past participle of irrītō (“to excite, provoke”).^[3][5][4][6] The OED treats the modern word, recorded from 1589, as taken directly from Latin, comparing the French word of the 14th and 15th centuries.^[4] The origin of the Latin verb is uncertain.^[7][3] Barnhart and Klein take it as the intensive of an unrecorded *irrīre, to stir up, related to Ancient Greek ὀρίνω (orínō, “to stir up, excite”) and going back to Proto-Indo-European *erei- (“to set in motion”);^[7][5] Etymonline reports de Vaan's view that it is probably formed from Proto-Italic *rito- (“stirred”), from the root of run.^[3] The Oxford Dictionary of Word Origins connects it with īra (“anger”), the source of ire.^[8]

Earliest recorded meaning

In medicine, the stimulation of a sore or a morbid swelling: about 1425, in the Middle English Chauliac.^[2][3]

Semantic evolution

The word first belonged to medicine,^[2][3] and the general sense "stirring up, incitement" followed in 1589; the OED counts it obsolete by the 19th century except as a transfer from the other senses.^[4][8] The medical sense of making a part of the body over-sensitive or mildly inflamed is recorded again from 1686, in Boyle.^[4][9] The modern meaning, anger or impatience, appears only in 1703,^[4][3] in the early 18th century,^[8][9] and later took in the thing that causes it.^[9][10] Johnson (1755) gave "provocation; exasperation" first and the physical "stimulation" second.^[11] From 1794, in E. Darwin's Zoonomia, physiology used the word for the stimulation of an organ or tissue to some vital action, such as a muscle's contraction.^[4][12]

Timeline

• c. 1425 – in medicine, stimulation of a sore or swelling.^[2]
• 1589 – stirring up, incitement (now obsolete).^[4]
• 1686 – excessive sensitivity or mild inflammation of a part of the body.^[4]
• 1703 – anger, impatience, annoyance.^[4][3]
• 1755 – Johnson: provocation, exasperation; stimulation.^[11]
• 1794 – in physiology, the stimulation of an organ or tissue to respond.^[4]

Meanings

Noun

1. A feeling of mild anger or impatience; annoyance: She could not hide her irritation at the delay.^[10][12][4]
2. Something that annoys: The barking dog next door was a constant irritation.^[10][9]
3. Soreness, itching or mild inflammation of a part of the body: The cream caused irritation of the skin.^[4][9]
4. (physiology) The stimulation of an organ, tissue or muscle so that it responds, as by contracting.^[4][9][12]
5. (obsolete, 1589–1859) The action of stirring up or provoking to activity; incitement.^[4][9]

Word family

• irritative

Related words

• irritable
• irritate
• irritant
• counterirritant

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f Kurath, Hans; Kuhn, Sherman M.; Lewis, Robert E., eds. (1952–2001), Middle English Dictionary, Ann Arbor: University of Michigan Press; online edition ed. Frances McSparran et al. (2000–2018)
3. ^ a b c d e f g h i Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b c d e f g h i j k l m n o Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
5. ^ a b Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
6. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
7. ^ a b Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
8. ^ a b c Cresswell, Julia (2021), Oxford Dictionary of Word Origins, 3rd ed., Oxford: Oxford University Press
9. ^ a b c d e f g Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
10. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins
11. ^ a b Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
12. ^ a b c Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster