indubiously

I1N1D2U1B3I1O1U1S1L1Y4

adverb

Synonym of without a doubt.

Similar
without a doubt
OriginEnglish indubious ← Latin indubius ← Proto-Italic *du(i)βwos →
Scrabble 17
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

adverbindubiously (comparative more indubiously, superlative most indubiously)

comparative more indubiously · superlative most indubiously

  1. Synonym of without a doubt.

    Synonyms: without a doubt

Synonyms & antonyms

adverbSynonym of without a doubt.

Similar
without a doubt

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
  13. Englishindubiously

From indubious + -ly. First attested in the 17th century.

Full word history & related roots →
Cite this entry
APA

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

MLA

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

Chicago

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

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