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traitorous

[trey-ter-uh s] /ˈtreɪ tər əs/
adjective
1.
having the character of a traitor; treacherous; perfidious.
2.
characteristic of a traitor.
3.
of the nature of treason; treasonable:
a traitorous act.
Origin of traitorous
1350-1400
1350-1400; Middle English treterous, traytrous < Old French traitreus; see traitor, -ous
Related forms
traitorously, adverb
traitorousness, noun
nontraitorous, adjective
nontraitorously, adverb
nontraitorousness, noun
untraitorous, adjective
untraitorously, adverb
untraitorousness, noun
Synonyms
1–3. disloyal, treasonous, faithless.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Word Origin and History for traitorous
adj.

late 14c., apparently from Old French traitreus (mid-13c.), from traitor (see traitor).

Online Etymology Dictionary, © 2010 Douglas Harper
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