Etymograph

English

kernel

Kernel comes from Old English cyrnel ‘a kernel’, from Proto-Germanic *kurną ‘seed, grain, corn’, and ultimately from Proto-Indo-European *ǵr̥h₂nóm.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*ǵr̥h₂nóm1‘grain’reconstructed
  2. Proto-Germanicc. 500 BCE–200 CE*kurną1‘seed, grain, corn’reconstructed
  3. Proto-West Germanicc. 200–500 CE*kurnil1‘kernel of a nut’reconstructed
  4. Old Englishc. 450–1150cyrnel1‘a kernel’
  5. Middle Englishc. 1150–1500kernel1
  6. Englishearliest quotation 1916kernel1

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, English kernel
  2. Earliest quotation in Wiktionary’s entry: 1916, Gilbert N. Lewis, The Atom and The Molecule: “1. In every atom is an essential kernel which…”.

Earlier history uncertain. See Wiktionary.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*ǵr̥h₂nómWiktionary, English kernel‘grain’reconstructed
  2. Proto-Germanicc. 500 BCE–200 CE*kurnąWiktionary, English kernel‘seed, grain, corn’reconstructed
  3. Proto-West Germanicc. 200–500 CE*kurnilWiktionary, English kernel‘kernel of a nut’reconstructed
  4. Old Englishc. 450–1150cyrnelWiktionary, English kernel‘a kernel’
  5. Middle Englishc. 1150–1500kernelWiktionary, English kernel
  6. Englishearliest quotation 1916kernelWiktionary, English kernel. Earliest quotation in Wiktionary’s entry: 1916, Gilbert N. Lewis, The Atom and The Molecule: “1. In every atom is an essential kernel which…”

Formed from corn + -le

Proto-Indo-European *ǵr̥h₂nóm ‘grain’

Proto-Germanic *kurną ‘corn, grain, cereal’

Proto-West Germanic *korn ‘corn, grain, cereal’

Old English corn ‘corn, a grain or seed’

Middle English corn ‘any plant that bears grain, especially wheat’

English corn

The story

Related also to Old Norse kjarni (‘kernel’).

Full etymology on Wiktionary

Linked words

through Proto-Indo-European *ǵerh₂- ‘to grow old, to mature’

carl, karl, garnet, geriatrics, churlish, 13 more

through Proto-Indo-European *ǵr̥h₂nóm ‘grain’

grain, granite, gram, grange, granular, corny, garner, granary, grenadier, granule, 9 more

through Proto-Germanic *kurną ‘seed, grain, corn’

corn, 3 more

Today it means

noun The core, center, or essence of an object or system.

Sources

Sources: Wiktionary, “kernel”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Proto-Indo-European *ǵr̥h₂nóm / kernel

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