Etymologically
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shale

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Pronunciation

Etymology

The name of the rock is of uncertain origin.[2][3] The OED and Barnhart take it as a specialized use of an older English noun meaning "shell, husk, pod", or of the verb formed from it, which was used of stone that splits as it is raised;[2][4][5] that noun is inherited from Middle English shāle, also schale,[6][5] inherited from Old English scealu (“shell, husk; dish, cup; scale of a balance”),[7][2][6] from Proto-Germanic *skalō.[2][8] Etymonline explains the sense from the base meaning "thing that divides or separates", since the rock breaks apart in layers.[5] Hoad, the Shorter Oxford and the Oxford Dictionary of English instead derive it, probably, from German Schale (“shell, husk, scale”), which is not used of this rock but appears in Schalstein (“laminated limestone”) and Schalgebirge (“mountain system of thin strata”);[9][10][11][12] the OED finds no good reason for that view, since the German word is not used in this sense.[2] Barnhart and Etymonline allow that the German words may have reinforced the geological sense.[4][5] Orel gives the Proto-Germanic noun's cognates as Middle Low German schale (“bark”) and Old High German scala (“shell, hull”), and compares Lithuanian skalà (“splinter”).[8] The American Heritage Dictionary refers the Old English noun to the Indo-European root Proto-Indo-European *skel-.[13] It is related to shell and scale.[5][4][14][15]

Earliest recorded meaning

A fine-grained rock formed from clay that splits into thin layers: 1747, in Hooson's Miners Dictionary.[2][4][5] The Shorter Oxford and the Oxford Dictionary of English date the word to the mid 18th century.[10][11] The older noun, a shell or husk, is recorded in Old English glosses,[2][7] and Chaucer used it once, of the shell of a nut, in the House of Fame.[16][17][4]

Semantic evolution

In Old English and early Middle English the older noun also meant a dish or cup, a sense recorded until 1325,[2][7] and its main sense, a shell, husk or pod, lasted until the 17th century.[2][6] From 1398 it was also used of a scale of a fish or of metal, and it meant the mesh of a net from 1606; both senses later survived only in dialect.[2][18] Johnson (1755) still defined it as a husk, the case of seeds in podded plants, quoting Shakespeare's "the shales and husks of men".[19] Barnhart sees a link between the rock, formed in sheets of sediment, and these earlier senses, all of which suggest thin layers of material, as does the dialect sense "loose material from a mine or quarry", recorded from 1793.[4][2] The rock name itself appears in a miners' dictionary in 1747;[2] Lyell, in 1830, also used the word of a particular kind or specimen of the rock.[2] In Scottish use it could mean alum shale.[2] Compounds such as oil shale, shale oil and shale gas name the oil-bearing rock, the oil distilled from it and the natural gas extracted from it.[20]

Timeline

  • Old English – scealu, a shell or husk; a dish or cup.[2][7]
  • c. 1380 – shale, the shell of a nut, in Chaucer's House of Fame.[4][16]
  • 1398 – a scale, of a fish or of metal (later only in dialect).[2]
  • 1606 – a mesh of a net (later only in dialect).[2]
  • 1668 – last record of the sense shell, husk.[2]
  • 1747 – the fissile rock, in Hooson's Miners Dictionary.[2][4][5]
  • 1793 – in dialect, loose material from a mine or quarry.[2]
  • 1830 – a variety or specimen of the rock, in Lyell.[2]

Meanings

Noun

  1. A soft, fine-grained sedimentary rock formed from compressed clay or mud, which splits easily into thin, fragile layers.[15][13][18][11]
  2. A kind or specimen of this rock: the black shales of the coalfield.[2]
  3. (dialect) A scale, as of a fish, or a flake.[18][2][21]
  4. (dialect) A mesh of a net.[18][2]
  5. (obsolete, Old English–1668) A shell or husk, as of a nut, or the pod of a pea or bean.[18][2][19]

Word family

  • shaley
  • shalelike
  • oil shale
  • shale oil

Usage notes

In Yorkshire, Lancashire, Northamptonshire, Gloucestershire, East Anglia and other dialects, shale or shail was also a verb meaning to walk crookedly or awkwardly, to shamble,[21] which Merriam-Webster derives from Middle English schaylen.[18]

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r s t u v w x y Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  4. ^ a b c d e f g h Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
  5. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  6. ^ a b c 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)
  7. ^ a b c d Bosworth, Joseph; Toller, T. Northcote (1898), An Anglo-Saxon Dictionary, Oxford: Clarendon Press; Toller, T. Northcote (1921), Supplement
  8. ^ a b Orel, Vladimir (2003), A Handbook of Germanic Etymology, Leiden / Boston: Brill
  9. ^ Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
  10. ^ a b Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  11. ^ a b c Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
  12. ^ Skeat, Walter W. (1911), A Concise Etymological Dictionary of the English Language, new ed., Oxford: Clarendon Press
  13. ^ a b The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
  14. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
  15. ^ a b Collins English Dictionary (2023), Glasgow: HarperCollins
  16. ^ a b Benson, Larry D., Glossarial Concordance to Middle English (Chaucer, Gower), Johns Hopkins University, github.com/jhu-digital-manuscripts/gcme
  17. ^ Skeat, W. W., ed. (1894), The Complete Works of Geoffrey Chaucer, vol. VI: Glossarial Index, Oxford: Clarendon Press
  18. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  19. ^ 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.
  20. ^ The Chambers Dictionary (2014), 13th ed., Edinburgh: Chambers
  21. ^ a b Wright, Joseph, ed. (1898–1905), The English Dialect Dictionary, 6 vols., Oxford: Henry Frowde; via EDD Online 4.0, University of Innsbruck (CC BY 4.0)