kernel

Etymology

It is inherited from Middle English kirnel, also curnel and kernel,^[2][3][4] inherited from Old English cyrnel (“seed, kernel, pip”),^[5][6][3] a diminutive of corn (“seed, grain”), the source of corn.^[3][7][8][9] The OED and Etymonline trace the diminutive to Germanic, comparing Middle High German kornel (“a grain”) and Middle Dutch cornel (“coarse meal”);^[3][5] Kroonen takes it from a diminutive of Proto-Germanic *kurną (“corn, wheat”),^[10] which also gave Gothic 𐌺𐌰𐌿𐍂𐌽 (kaurn, “grain, wheat”), Old Norse korn and Old High German korn,^[10] and goes back to Proto-Indo-European *ǵrh₂-no-, the source of Latin grānum (“grain, seed”).^[10][5] According to the OED, cyrnel gave southern Middle English curnel and midland and northern kirnel, and the modern spelling grew out of kirnel;^[3][7] Barnhart dates the spelling kernel to 1381.^[4]

Earliest recorded meaning

In Old English, a seed, especially one inside a fruit, a pip: about 1000, in Ælfric's Homilies.^[3][4] Old English also used it for the soft part inside a nut and for a swollen gland.^[3][6]

Semantic evolution

Ayto explains that the "little seed" was applied to pips (now obsolete), to seeds (now only of cereals) and to the inner part of nuts and fruit stones.^[9] The sense "grain of wheat" is first recorded about 1230, in the Ancrene Riwle, and Barnhart finds curnel, a kernel of grain, probably before 1200.^[3][4] The figurative sense, the core or central part of anything, dates from the 1550s in Etymonline^[5] and the 16th century in Hoad,^[7] while the OED's first quotation is from before 1642.^[3] Old English and later medicine also used the word for a gland or a swelling in the neck or groin, a sense now chiefly dialectal.^[3][7][6] In the English Dialect Dictionary it is a grain or seed of wheat in many counties.^[11] Johnson (1755) compared Dutch and French words, but defined it simply as the edible substance inside a shell.^[12]

Timeline

• c. 1000 – a seed or pip; the soft part inside a nut; a swollen gland.^[3][4]
• before 1200 – curnel, a kernel of grain.^[4]
• c. 1230 – a grain of wheat or another cereal.^[3]
• 1381 – the spelling kernel.^[4]
• 1483 – verb, to form kernels (obsolete by 1722).^[3]
• 1550s – the core or central part of anything.^[5]
• 1652 – verb, to enclose as a kernel in its shell.^[3]

Meanings

Noun

1. The soft, usually edible part inside the hard shell of a nut or the stone of a fruit: an almond kernel.^[13][2][3]
2. A whole grain of a cereal, especially wheat, or the seed inside its husk.^[13][3]
3. The central or most essential part of something; a core: There is a kernel of truth in the rumour.^[13][3][5]
4. (obsolete except in dialect) A seed, especially a pip in a fruit.^[3][2][14]
5. (chiefly dialect) A gland, or a swelling in the neck or groin.^[3][7]

Verb

1. (rare) To form or produce kernels.^[13][2]

Word family

• kerneled
• kernelless
• kernelly
• kernel sentence

Related words

• corn
• grain
• crenel

Usage notes

A separate kernel, an embrasure in a battlement, was borrowed in Middle English from Old French kernel, a variant of crenel (the source of crenel); the OED records it from about 1225 to 1652,^[3][14][15] with a verb kernel, to crenellate, from 1377.^[3][2]

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
3. ^ a b c d e f g h i j k l m n o p q r s t u Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
4. ^ a b c d e f g Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
5. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
6. ^ a b c Bosworth, Joseph; Toller, T. Northcote (1898), An Anglo-Saxon Dictionary, Oxford: Clarendon Press; Toller, T. Northcote (1921), Supplement
7. ^ a b c d e Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
8. ^ Skeat, Walter W. (1911), A Concise Etymological Dictionary of the English Language, new ed., Oxford: Clarendon Press
9. ^ a b Ayto, John (2005), Word Origins: The Secret Histories of English Words from A to Z, 2nd ed., London: A & C Black
10. ^ a b c Kroonen, Guus (2013), Etymological Dictionary of Proto-Germanic, Leiden Indo-European Etymological Dictionary Series 11, Leiden / Boston: Brill
11. ^ 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)
12. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
13. ^ a b c d Collins English Dictionary (2023), Glasgow: HarperCollins
14. ^ a b Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
15. ^ Stratmann, Francis Henry (1891), A Middle-English Dictionary, revised by Henry Bradley, Oxford: Clarendon Press