Etymology

indubitably

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Today it means: In a manner that leaves no possibility of doubt. Full definition →

Proto-Germanic *līką ← Proto-Indo-European *leyg- ← English indubitable
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The story

  1. Englishindubitable
  2. Proto-Indo-European*leyg-
  3. Proto-Germanic*līką
  4. English todayindubitably

From indubitable + -ly.

Etymology from Wiktionary, CC BY-SA 4.0.