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Definition of indubitably
indubitably
/ɪnˈduː.bɪ.tə.bli/
in · du · bi · ta · bly
Adjective:indubitable
indubitably Lexical Profile
CEFR
C2
Grade
12
Tier
2
Usage
Rare
Syllables
5
indubitably Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• adverb
1
In a manner that leaves no room for doubt; unquestionably or undeniably.
Example
"Her pioneering research has indubitably transformed our understanding of cellular regeneration."
Synonyms
View all synonyms for indubitably Antonyms
View all antonyms for indubitablyWord Nuance & Usage
Because of its highly formal register and Victorian literary associations, "indubitably" is often used humorously or ironically in everyday conversation.
Word Origin & Etymology
Formed in English from the adjective "indubitable" plus the adverbial suffix "-ly," ultimately deriving from the Latin "indubitabilis," meaning "that cannot be doubted" (from "in-" meaning "not" and "dubitare" meaning "to doubt").
Cite this Entry
Wordmom. (2026). Definition of Indubitably. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/indubitably