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Definition of doubtlessly

doubtlessly

/ˈdaʊt.ləs.li/
doubt · less · ly
Adjective:doubtless
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doubtlessly Lexical Profile

doubtlessly Game Scores & Validity

• adverb

1

Without a doubt; unquestionably; almost certainly.

Example

"The new infrastructure project will doubtlessly improve traffic flow across the metropolitan area."

Synonyms
View all synonyms for doubtlessly
Antonyms
View all antonyms for doubtlessly

Word Nuance & Usage

Because 'doubtless' already functions as a standard adverb, some traditional style guides consider 'doubtlessly' redundant and prefer 'doubtless' or 'undoubtedly' in formal writing.

• Rhymes for doubtlessly

• Nearby Words

doubtfully
doubtfulness
doubtless
doubtlessly
douche
douchebag
douchebaggery

Cite this Entry

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