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Meaning of treacherous

treach•er•ous

Pronunciation: (trech'ur-us), [key]
— adj.
  1. characterized by faithlessness or readiness to betray trust; traitorous.
  2. deceptive, untrustworthy, or unreliable.
  3. unstable or insecure, as footing.
  4. dangerous; hazardous: a treacherous climb.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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