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Without question; indubitably.
Definition source: English Wiktionary via Wiktextract
Usage: proscribed, sometimes
Examples
- There are doubtlessly more insects than mammals.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Without feeling doubt, without misgivings.
Definition source: English Wiktionary via Wiktextract
Usage: obsolete
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
without doubt; certainly
Definition source: Princeton WordNet 3.0
Examples
- it's undoubtedly very beautiful
Meaning relationships
Synonyms: undoubtedly, doubtless
Antonyms: none provided
From Middle English doutelesly, dowtelesly, equivalent to doubtless + -ly.