indefatigably
/ˌɪndəˈfætəɡəbli/adverb
indefatigably is spelled I-N-D-E-F-A-T-I-G-A-B-L-Y: 13 letters. It appears about once in every 28 million words in written English, the 159,707th most frequent word form (wordfreq, 2021 data). As an adverb, indefatigably means “In an extremely persistent and untiring manner; in an indefatigable manner” (English Wiktionary, September 2026).
How many letters and syllables are in indefatigably?
| Letters | 13: I-N-D-E-F-A-T-I-G-A-B-L-Y |
|---|---|
| In writing | about once in every 28 million words; the 159,707th most frequent word form |
| Wrong spellings searched | none measured in search |
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).
How common is indefatigably?
Indefatigably appears about once in every 28 million words in written English, the 159,707th 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 indefatigably?
- US /ˌɪndəˈfætəɡəbli/
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of indefatigably
- more indefatigably comparative
- most indefatigably superlative
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does indefatigably mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adverb
- 1
In an extremely persistent and untiring manner; in an indefatigable manner
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does indefatigably come from?
From indefatigable + -ly, but indefatigable itself was attested later. In use since the 16th century.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).