imperturbable
Language: English
Part of speech: adj
Pronunciation: ipa: /ˌɪmpəˈtɜːbəbl̩/
ipa: /ˌɪmpəɹˈtɜɹbəb(ə)l/
Forms: form: more imperturbable
form: most imperturbable
Etymology: PIE word
 *né
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)). Perturbō is derived from per- (intensifying prefix) + turbō (“to agitate, disturb, unsettle, perturb; to upset”) (from turba (“disorder, disturbance, turmoil”) (possibly from Ancient Greek τῠ́ρβη (tŭ́rbē, “confusion, disorder, tumult”), either from Pre-Greek, or Proto-Indo-European *(s)twerH- (“to agitate, stir up; to urge on, propel”)) + -ō (suffix forming infinitives of regular first-conjugation verbs)). By surface analysis, im- (prefix meaning ‘not’) + perturbable.
Senses: examples: text: [T]o a vviſe man there can happen no iniury or offence at all, to moleſt the felicity of his minde, vvhich (in the Stoicks opinion) ought to bee imperturbable, and his heart adamantine.
ref: 1605, Giacomo Affinati d’Acuto Romano, chapter 23, in A[nthony] M[unday], transl., The Dumbe Divine Speaker, or: Dumbe Speaker of Diuinity. […], London: […] [R. Bradock] for William Leake, […], →OCLC, page 257:
text: [T]he good Dominie bore all his disasters with gravity and serenity equally imperturbable. "Prodi-gi-ous!" was the only ejaculation they ever extorted from the much-enduring man.
ref: 1815 February 24, [Walter Scott], chapter VIII, in Guy Mannering; or, The Astrologer. […], volume I, Edinburgh: […] James Ballantyne and Co. for Longman, Hurst, Rees, Orme, and Brown, […]; and Archibald Constable and Co., […], →OCLC, page 116:
text: In the meanwhile, Sir Piercie Shafton sate still as a stone on the chair in which he had deposited himself, […] his eyes cast up to the ceiling as if he had meant to count every mesh of cobweb with which the arched roof was canopied, wearing at the same time a face of as solemn and imperturbable gravity, as if his existence had depended on the accuracy of his calculation.
ref: 1820 March, [Walter Scott], chapter II, in The Monastery. A Romance. […], volume II, Edinburgh: […] Longman, Hurst, Rees, Orme, and Brown, […]; and for Archibald Constable and Co., and John Ballantyne, […], →OCLC, pages 60–61:
text: "We may keep it by us," replied the pawnbroker, "for months; there is no demand for such articles." "But," exclaimed she, eagerly, "I shall soon redeem it!" "So you all say," returned the man, with imperturbable coolness.
ref: 1837, L[etitia] E[lizabeth] L[andon], “Poverty”, in Ethel Churchill: Or, The Two Brides. […], volume III, London: Henry Colburn, […], →OCLC, page 280:
text: This sort of thing is meat and drink to the born Controller—and Controllers are born with the right imperturbable temperament for the job; hence the fact that they are recruited from many different grades of operating staff, and some recruits don't stay the course.
ref: 1962 August, G[eoffrey] Freeman Allen, “Traffic Control on the Great Northern Line”, in Modern Railways, Shepperton, Surrey: Ian Allan Publishing, →ISSN, →OCLC, page 132:
synonyms: word: cool-headed
word: unexcitable
word: unperturbable
word: calm
word: collected
word: composed
word: cool-headed
word: equable
word: equanimous
word: equanimitable
word: even-keeled
word: even-minded
word: even-tempered
word: imperturbable
word: laid-back
word: level-headed
word: mellow
word: pacate
word: pacific
word: peaceable
word: peaceful
word: phlegmatic
word: placid
word: quiescent
word: quiet
word: relaxed
word: roolie
word: sedate
word: serene
word: still
word: tranquil
word: unexcited
word: unfazed
word: unflappable
word: unflustered
word: unperturbable
word: unruffable
word: unruffled
word: untumultuous
word: abstemious
word: calm
word: collected
word: composed
word: continent
word: cool
word: dispassionate
word: inexcitable
word: imperturbable
word: regular
word: sedate
word: sober
word: steady
word: staid
word: temperate
word: undisturbed
word: unexcitable
word: unexcited
word: unimpassioned
word: unpassionate
word: unperturbed
word: unruffled
word: unstirred
word: unsusceptible
antonyms: word: perturbable
word: calm
word: imperturbable
word: serene
word: calm
word: intrepid
word: unperturbed
word: unworried
glosses: Not capable of being, or not easily, perturbed, excited, or upset; calm and collected, even under pressure.
Derived terms: imperturbability
imperturbableness
imperturbably
Related terms: word: perturb
word: perturbability
word: perturbable
word: perturbation
word: perturbational
word: perturbed
word: perturber
word: perturbing
word: perturbment
word: unperturbability
word: unperturbable
word: unperturbably