unaffected

1 [uhn-uh-fek-tid]
adjective
1.
free from affectation; sincere; genuine: The man showed unaffected grief at the death of his former opponent.
2.
unpretentious, as a personality or literary style.

Origin:
1580–90; un-1 + affected2

unaffectedly, adverb
unaffectedness, noun


1. plain, natural, simple, honest, real, unfeigned, artless; naive, guileless.
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unaffected

2 [uhn-uh-fek-tid]
adjective
not affected, acted upon, or influenced; unchanged; unaltered: The laboratory clock remained accurate, unaffected by the explosion.

Origin:
1580–90; un-1 + affected1


unmoved, untouched, unimpressed, unstirred.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
unaffected1 (ˌʌnəˈfɛktɪd)
 
adj
unpretentious, natural, or sincere
 
unaf'fectedly1
 
adv
 
unaf'fectedness1
 
n

unaffected2 (ˌʌnəˈfɛktɪd)
 
adj
not affected

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

unaffected
c.1586, "not influenced, untouched in mind or feeling," from un- (1) "not" + pp. of affect. Meaning "not adopted or assumed, genuine" is recorded from 1592; that of "not acted upon or altered (by something)" is first attested 1830.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Watching programs that come from your cable or satellite feed are unaffected.
The dense sphere will also be virtually unaffected by radiation pressure from
  sunlight.
And so, the ability of a household to pay a mortgage is unaffected in that
  situation.
When album sales began to crumble and radio fragmented, these bands were mostly
  unaffected.
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