Etymology

sonobuoy

S1O1N1O1B3U1O1Y4

Today it means: A buoy that sends a radio signal when it detects the sound of underwater objects (such as submarines). Full definition →

English buoy ← Latin sonus ← Proto-Indo-European *swónh₂os
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The story

  1. Proto-Indo-European*swenh₂-
  2. Proto-Indo-European*swónh₂os
  3. Latinsonus
  4. Englishsono-
  5. Englishbuoy
  6. English todaysonobuoy

From sono- + buoy.

Etymology from Wiktionary, CC BY-SA 4.0.