Etymology

transonic

T1R1A1N1S1O1N1I1C3

Today it means: Just below, or just above, the speed of sound (0.8 < Ma < 1.2 approximately). Full definition →

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

  1. Englishtran-
  2. Proto-Indo-European*swenh₂-
  3. Proto-Indo-European*swónh₂os
  4. Latinsonus
  5. Englishsonic
  6. English todaytransonic

From tran- + sonic.

Etymology from Wiktionary, CC BY-SA 4.0.