Etymology

interlock

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Today it means: To fit or clasp together securely. Full definition →

English lock ← Middle English lok ← Old English loc
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The story

  1. Proto-Indo-European*h₁én
  2. Proto-Indo-European*h₁n̥tér
  3. Proto-Italic*n̥ter
  4. Latininter
  5. Latininter-
  6. Englishinter-
  7. Proto-Indo-European*lewg-
  8. Proto-Germanic*luką
  9. Proto-West Germanic*lok
  10. Old Englishloc
  11. Middle Englishlok
  12. Englishlock
  13. English todayinterlock

From inter- + lock.

Etymology from Wiktionary, CC BY-SA 4.0.