doubtless

Characterized by or experiencing no doubt at all, certain; undoubted; undoubting.

Adjective

  1. Characterized by or experiencing no doubt at all, certain; undoubted; undoubting.
    • There are those who have doubtless faith in revelation. - 1880, B. Stewart, P. G. Tait, The Unseen Universe, London: Macmillan, page xiii:
    • It is doubtless that the old reprobate who sued for his daughter's hand heard some unsavory truths from the man. - 1927, Edgar Rice Burroughs, chapter 7, in The Outlaw of Torn:
  2. Free from fear or suspicion.
    • And, pretty childe, ſleepe doubtleſſe, and ſecure, / That Hubert for the wealth of all the world, / Will not offend thee. - c. 1596 (date written), William Shakespeare, “The Life and Death of King Iohn”, in Mr. William...

Origin

From Middle English douteles, dowteles, equivalent to doubt + -less.

Forms

doubtlesse doutless

Derived

doubtlessly doubtlessness

Adverb

  1. Without doubt; certainly; definitely; very probably, in all likelihood; doubtlessly.
    • […] And, doubtless, unto thee is given ⁠A life that bears immortal fruit ⁠In such great offices as suit The full-grown energies of heaven. - 1850, [Alfred, Lord Tennyson], “Canto XXXIX”, in In Memoriam, London: Edward...
    • I cannot remember that I spoke a word, though doubtless I did. - 1893, Ambrose Bierce, The Realm Of The Unreal:
    • The men, Dorothy thought, were about as old as Uncle Henry, for two of them had beards. But the little woman was doubtless much older: her face was covered with wrinkles, her hair was nearly white, and she walked rather...

    Synonyms: indubitably undoubtably undoubtedly unquestionably without a doubt without doubt indisputably

Forms

doubtlesse doutless