Etymograph

English

indubiously

Indubiously comes from Latin indubius ‘certain, not in doubt’, and goes back to dubius.

  1. Latinc. 75 BCE–200 CEdubius‘Vacillating in mind, wavering, uncertain, doubting, doubtful, dubious, irresolute’
  2. Latin, derivedc. 75 BCE–200 CEindubius‘certain, not in doubt’
  3. English1500–presentindubious
  4. Englishtodayindubiously

attested reconstructed ? uncertain or disputed

Earlier history uncertain.

Lineage

  1. Latinc. 75 BCE–200 CEdubius‘Vacillating in mind, wavering, uncertain, doubting, doubtful, dubious, irresolute’
  2. Latin, derivedc. 75 BCE–200 CEindubius‘certain, not in doubt’
  3. English1500–presentindubious
  4. Englishtodayindubiously

A compound of indubious + -ly

Latin dubius ‘Vacillating in mind, wavering, uncertain,…’

Latin indubius ‘certain, not in doubt’

English indubious

first attested First attested in the 17th century (as stated in the etymology)

The story

First attested in the 17th century.

Linked words

through Latin dubius ‘Vacillating in mind, wavering, uncertain,…’

doubt, dubious, 6 more

Today it means

adv Synonym of without a doubt.

Language periods are conventional ranges, not dates for this word.

Etymograph / Latin dubius / indubiously