Etymology

undeadliness

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Today it means: The condition of not being susceptible to death; immortality. Full definition →

Middle English undedlynesse ← Old English undēadlīcnes
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The story

  1. Old English · derived fromundēadlīcnes“immortality”
  2. Middle English · calque ofundedlynesse
  3. English todayundeadliness

Calque of Middle English undedlynesse (or, in some cases, a continuation rather than a calque), from Old English undēadlīcnes (“immortality”); equivalent to undeadly + -ness; compare German Unsterblichkeit, a similarly formed compound.

Etymology from Wiktionary, CC BY-SA 4.0.