English vocabulary · C1
Indubitable
/ɪnˈduːbɪtəbəl/ · adj.
Indubitable means no one can have a real doubt about it. The facts are so clear that every person sees the same answer.
Continue in the learning app for video lessons and review.
Example sentences
- His guilt became indubitable.
- The match made his skill indubitable.
Word origin and roots
from Latin
- in — not (from Latin)
- dub — doubt (from Latin)
Synonyms and nuances
- SURE — feeling no doubt (No Personal Doubt)
- CERTAIN — known without doubt (Known To Be True)
- PROVEN — shown to be true (Shown By Facts)
Words with the same root
dub — doubt
- doubt — a feeling of uncertainty
- dubious — not clearly true
Lesson notes
Indubitable means no one can have a real doubt about it. The facts are so clear that every person sees the same answer.
Related: sure, certain, proven. Use indubitable when no one can doubt the facts.
His guilt became indubitable. The match made his skill indubitable.
From Latin. in- means not. dub- means doubt. Not in doubt: that is indubitable.