indubious

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/ɪnˈdjuːbiəs//ɪnˈduːbiəs/

adjective

Not dubious or doubtful; certain.

OriginLatin indubius ← Proto-Italic *du(i)βwos ← Proto-Indo-European *bʰuH- →
Scrabble 12
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Meanings

adjectiveindubious (comparative more indubious, superlative most indubious)

comparative more indubious · superlative most indubious

  1. Not dubious or doubtful; certain.
  2. Not doubting; unsuspecting.

    indubious confidence

    1673, Gideon Harvey, A Discourse of the Plague

Origin

  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. Englishindubious

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

More words from Latin

Full word history & related roots →
Cite this entry
APA

indubious. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/indubious

MLA

“indubious.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/indubious. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “indubious,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/indubious.

Source: indubious on Wiktionary, CC BY-SA 4.0.