undoubtedly
un·doubt·ed·ly/ʌnˈdaʊtɪdli/adverb
undoubtedly is spelled U-N-D-O-U-B-T-E-D-L-Y, 4 syllables: un·doubt·ed·ly. The wrong spelling people search most is undoubtely: about 10 Bing searches a month in the United States (September 2025 to August 2026), about 1 in 50 of all searches for the word. Undoubtedly is an adverb meaning “Without doubt; definitely”.
How many letters and syllables are in undoubtedly?
| Letters | 11: U-N-D-O-U-B-T-E-D-L-Y |
|---|---|
| Syllables | 4: un·doubt·ed·ly |
| In writing | 7.6 times per million words; the 8,542nd most frequent word form |
| Wrong spellings searched | 1; the most searched, undoubtely, about 10 Bing searches a month (all of them) |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026).
How do you spell undoubtedly?
Undoubtedly is spelled U-N-D-O-U-B-T-E-D-L-Y. One wrong spelling is searched or written often enough to measure; together they are about 1 in 50 of the searches for undoubtedly in either form.
Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026). Wrong spellings are taken from Wiktionary entries tagged "misspelling" and its obsolete or nonstandard forms, Wikipedia's Lists of common misspellings and the codespell dictionary, then measured. The proofreader's marks show the change that corrects each one.
How common is undoubtedly?
Undoubtedly appears 7.6 times per million words in written English, the 8,542nd most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce undoubtedly?
- /ʌnˈdaʊtɪdli/
- /ʌnˈdaʊtɪbli/
Undoubtedly has 4 syllables, split un·doubt·ed·ly in writing.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-undoubtedly.ogg, Wikimedia Commons (author and licence on each file's page).
Forms of undoubtedly
- more undoubtedly comparative
- most undoubtedly superlative
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does undoubtedly mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adverb
- 1
Without doubt; definitely.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Undoubtedly in Spanish, French, German and Portuguese
In the sense without doubt:
| Language | Words |
|---|---|
| French | sans aucun doute, sans nul doute |
| German | zweifellos |
| Portuguese | indubitavelmente |
| Spanish | indudadamente |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does undoubtedly come from?
From Middle English undoutedly, equivalent to undoubted + -ly.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).