Standard Lemma guide

doubtless

adj · adv · 4 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˈdaʊ̯tləs/
  • Canada: /ˈdʌʊ̯tləs/
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: D AW1 T L AH0 S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

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

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Free from fear or suspicion.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable, obsolete

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adv

Meaning 3

Without doubt; certainly; definitely; very probably, in all likelihood; doubtlessly.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

No example sentence was provided for this meaning.

Meaning relationships

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

Antonyms: none provided

4

adverb

Meaning 4

without doubt; certainly

Definition source: Princeton WordNet 3.0

Examples

  • it's undoubtedly very beautiful

Meaning relationships

Synonyms: undoubtedly, doubtlessly

Antonyms: none provided

History

Etymology

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

Across languages

Translations

26 source translations are retained for this English entry.

  • Bulgarian: несъмне́н (nesǎmnén) — characterized by no doubt
  • Bulgarian: безспо́рен (bezspóren) — characterized by no doubt
  • Bulgarian: си́гурен (síguren) — characterized by no doubt
  • Czech: nepochybný — characterized by no doubt
  • Esperanto: senduba — characterized by no doubt
  • German: zweifelsfrei — characterized by no doubt
  • German: zweifellos — characterized by no doubt
  • Old Norse: iflauss — characterized by no doubt
  • Polish: bez wątpliwości — characterized by no doubt
  • Russian: несомне́нный (nesomnénnyj) — characterized by no doubt
  • Swedish: tveklös — characterized by no doubt
  • Bulgarian: несъмне́но (nesǎmnéno) — without question
  • Bulgarian: безспо́рно (bezspórno) — without question
  • Bulgarian: си́гурно (sígurno) — without question
  • Danish: utvivlsomt — without question
  • Dutch: zonder twijfel — without question
  • Dutch: ongetwijfeld — without question
  • Esperanto: sendube — without question
  • Finnish: epäilemättä — without question
  • French: sans aucun doute — without question
  • French: sans nul doute — without question
  • French: indubitablement — without question
  • German: zweifellos — without question
  • Old Norse: iflaust — without question
  • Swedish: utan tvivel — without question
  • Swedish: tveklöst — without question