doubtless
[ dout-lis ]
/ ˈdaʊt lɪs /
adverb Also doubt·less·ly.
without doubt; certainly; surely; unquestionably.
probably or presumably.
adjective
free from doubt or uncertainty; certain, sure.
RELATED WORDS
doubtless, undoubtedly, certainly, indubitably, positively, presumably, probably, surely, unquestionably
Nearby words
Origin of doubtless
Synonym study
1, 2. Doubtless, undoubtedly, indubitably, unquestionably are adverbs that express certainty. Doubtless, although it sometimes denotes an absolute degree of certainty, more often means “probably,” “presumably,” or “no doubt”: She will doubtless accept the offer. Undoubtedly means “beyond doubt”: undoubtedly the most prolific and popular composer of his time. Indubitably and unquestionably both affirm an unassailable conviction; they differ only in tone, indubitably being appropriate to more formal or learned discourse and unquestionably appropriate in a wider range of contexts and styles: an indubitably (or unquestionably) accurate transliteration of the hieroglyphic text; unquestionably the hottest running back in the league.
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for doubtlessly
doubtless
/ (ˈdaʊtlɪs) /
adverb Also: doubtlessly (sentence substitute or sentence modifier)
certainly
probably
adjective
certain; assured
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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doubtless
mid-14c. (adv.), mid-15c. (adj.), from doubt (n.) + -less. Related: Doubtlessly.
Online Etymology Dictionary, © 2010 Douglas Harper