im·per·turb·a·ble

[im-per-tur-buh-buhl]
adjective
incapable of being upset or agitated; not easily excited; calm: imperturbable composure.

Origin:
1490–1500; < Late Latin imperturbābilis. See im-2, perturbable

im·per·turb·a·bil·i·ty, im·per·turb·a·ble·ness, noun
im·per·turb·a·bly, adverb


composed, collected, impassive, cool, unmoved.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
imperturbable (ˌɪmpɜːˈtɜːbəbəl) [Click for IPA pronunciation guide]
 
adj
not easily perturbed; calm; unruffled
 
imperturba'bility
 
n
 
imper'turbableness
 
n
 
imper'turbably
 
adv
 
imperturbation
 
n

00:10
Imperturbability is always a great word to know.
So is slumgullion. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a chattering or flighty, light-headed person.
imperturbable (ˌɪmpɜːˈtɜːbəbəl) [Click for IPA pronunciation guide]
 
adj
not easily perturbed; calm; unruffled
 
imperturba'bility
 
n
 
imper'turbableness
 
n
 
imper'turbably
 
adv
 
imperturbation
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

imperturbable
mid-15c., from L.L. imperturbabilis "that cannot be disturbed" (Augustine), from in- "not" + *perturbabilis, from L. perturbare "to confuse, disturb" (see perturb).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Manliness is expressed through emotional coolness, ruthlessness, and imperturbability at any depravity.
What suggestions of imperturbability and being, as against the human trait of mere seeming.
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