Etymology

immutable

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Today it means: Unable to be changed without exception. Full definition →

Middle English immutable ← Latin immūtābilis
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The story

  1. Latin · derived fromimmūtābilis“unchangeable”
  2. Middle English · inherited fromimmutable
  3. English todayimmutable

From Middle English immutable, from Latin immūtābilis (“unchangeable”); im- + mutable.

Etymology from Wiktionary, CC BY-SA 4.0.