Etymology

collateral

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Today it means: Parallel, in the same vein, side by side. Full definition →

Medieval Latin collaterālis ← Latin col-
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The story

  1. Latin · derived fromcol-“together with”
  2. Medieval Latin · derived fromcollaterālis
  3. English todaycollateral

Recorded since c.1378, from Old French, from Medieval Latin collaterālis, from Latin col- (“together with”) (a form of con-) + the stem of latus (“side”). By surface analysis, col- + lateral.

Etymology from Wiktionary, CC BY-SA 4.0.