Etymology

indubious

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Today it means: Not dubious or doubtful; certain. Full definition →

Latin indubius ← Proto-Italic *du(i)βwos ← Proto-Indo-European *bʰuH-
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The story

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Italic*n̥-
  4. Latinin-
  5. Proto-Indo-European*dwóh₁
  6. Proto-Indo-European*dwi-
  7. Proto-Indo-European*bʰuH-
  8. Proto-Italic*du(i)βwos
  9. Latin*dubosde
  10. Latindubius
  11. Latinindubius
  12. English todayindubious

Derived from Latin indubius. By surface analysis, in- + dubious.

Etymology from Wiktionary, CC BY-SA 4.0.