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Definition of doubtless

doubtless

/ˈdaʊt.ləs/
doubt · less
Adverb:doubtlessly
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doubtless Lexical Profile

doubtless Game Scores & Validity

• adverb

1

Without doubt; certainly, or very probably.

Example

"The newly discovered manuscripts will doubtless shed new light on the philosopher's early years."

Synonyms
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Antonyms
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• adjective

1

Free from doubt or uncertainty; assured and confident.

Example

"They remained doubtless of the scholarly value of their archival findings."

Synonyms
View all synonyms for doubtless
Antonyms
View all antonyms for doubtless

Word Nuance & Usage

In modern usage, 'doubtless' as a sentence adverb often implies strong probability ('very likely' or 'presumably') rather than absolute certainty, whereas 'undoubtedly' and 'without doubt' express firmer conviction.

• Rhymes for doubtless

• Nearby Words

doubtful
doubtfully
doubtfulness
doubtless
doubtlessly
douche
douchebag

Word Origin & Etymology

Formed in Middle English in the 14th century from the noun 'doubt' (via Old French 'doute', from Latin 'dubitare', meaning to hesitate or waver) combined with the privative suffix '-less'.

Cite this Entry

Wordmom. (2026). Definition of Doubtless. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/doubtless
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