English
acidity
Acidity comes from Latin aciditās ‘sourness, acidity’, from acidus ‘sour, acid’, and ultimately from Proto-Indo-European *h₂eḱ- ‘sharp’.
- Proto-Indo-Europeanc. 4500–2500 BCE*h₂eḱ-‘sharp’reconstructed
- Proto-Indo-European, derivedc. 4500–2500 BCE*h₂eḱéh₁yetireconstructed
- Proto-Italicc. 1500–700 BCE*akēōreconstructed
- Latinc. 75 BCE–200 CEaceō‘to be sour’
- Latin, derivedc. 75 BCE–200 CEacidus‘sour, acid’
- Latin, derivedc. 75 BCE–200 CEaciditās‘sourness, acidity’
- Latin, derivedc. 75 BCE–200 CEaciditātemaccusative singular of aciditās
- Frenchc. 1600–presentacidité
- Englishearliest quotation 1912acidity
attested reconstructed ? uncertain or disputed
Lineage
- Proto-Indo-Europeanc. 4500–2500 BCE*h₂eḱ-‘sharp’reconstructed
- Proto-Indo-European, derivedc. 4500–2500 BCE*h₂eḱéh₁yetireconstructed
- Proto-Italicc. 1500–700 BCE*akēōreconstructed
- Latinc. 75 BCE–200 CEaceō‘to be sour’
- Latin, derivedc. 75 BCE–200 CEacidus‘sour, acid’
- Latin, derivedc. 75 BCE–200 CEaciditās‘sourness, acidity’
- Latin, derivedc. 75 BCE–200 CEaciditātemaccusative singular of aciditās
- Frenchc. 1600–presentacidité
- Englishearliest quotation 1912acidity
Earliest quotation: 1912, Arthur Conan Doyle, The Lost World […]: “What shall we call it?" he asked. "Why should…”
Formed from acid + -ity
Proto-Indo-European *h₂eḱ- ‘sharp’
…
Proto-Italic *akēō
Latin aceō ‘to be sour’
Latin acidus ‘sour’
French acide ‘acid’
English acid
Linked words
through Proto-Indo-European *h₂eḱ- ‘sharp’
hear, edge, egg, ear, hammer, eager, axe, acute, vinegar, oxide, acne, mediocre, paragon, acupuncture, hark, exacerbate, acumen, mediocrity, acme, acacia, rosacea, acuity, acrimony, exacerbation, acerbic, acrid, 72 more
through Latin aceō ‘to be sour’
through Latin acidus ‘sour, acid’
Today it means
noun The quality or state of being acid.
Language periods are conventional ranges, not dates for this word.
Etymograph / Proto-Indo-European *h₂eḱ- / acidity