imperturbable
im·per·tur·ba·ble/ˌɪmpəɹˈtɜɹbəb(ə)l/adjective
imperturbable is spelled I-M-P-E-R-T-U-R-B-A-B-L-E: 13 letters and 5 syllables (im·per·tur·ba·ble). It appears about once in every 13 million words in written English, the 106,501st most frequent word form (wordfreq, 2021 data). As an adjective, imperturbable means “Not capable of being, or not easily, perturbed, excited, or upset; calm and collected, even under pressure” (English Wiktionary, September 2026).
How many letters and syllables are in imperturbable?
| Letters | 13: I-M-P-E-R-T-U-R-B-A-B-L-E |
|---|---|
| Syllables | 5: im·per·tur·ba·ble |
| In writing | about once in every 13 million words; the 106,501st 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 imperturbable?
Imperturbable appears about once in every 13 million words in written English, the 106,501st 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 imperturbable?
- UK /ˌɪmpəˈtɜːbəbl̩/
- US /ˌɪmpəɹˈtɜɹbəb(ə)l/
Imperturbable has 5 syllables, split im·per·tur·ba·ble in writing.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Qwertygiy-imperturbable.wav, Wikimedia Commons (author and licence on each file's page).
Forms of imperturbable
- more imperturbable comparative
- most imperturbable superlative
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does imperturbable mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Not capable of being, or not easily, perturbed, excited, or upset; calm and collected, even under pressure.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Imperturbable in Spanish, French, German and Portuguese
In the sense not capable of being, or not easily, perturbed:
| Language | Words |
|---|---|
| French | imperturbable |
| German | unbeirrt, unerschütterlich |
| Portuguese | imperturbável |
| Spanish | imperturbable |
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 imperturbable come from?
From Late Middle English imperturbable (“undisturbed; impossible to disturb”), borrowed from Late Latin imperturbābilis, from Latin im- (variant of in- (prefix meaning ‘not’)) + Late Latin perturbabilis (“perturbable”) (from Latin perturbō (“to confuse; to alarm, disturb, trouble, perturb”) + -bilis (suffix forming adjectives denoting a capacity or worth of being acted upon)).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).