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treacherous

Treacherous describes someone who is guilty of dishonesty or betrayal, or something that is dangerous or hazardous. (adjective)

  1. An example of treacherous is someone you thought was your friend who shares your secrets with everyone.
  2. An example of treacherous is ground made slippery because of an ice storm.

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See treacherous in Webster's New World College Dictionary

See treacherous in American Heritage Dictionary 4

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