…King of Naples, being an enemy To me inveterate, hearkens my brother’s suit; Which was, that he, in lieu o’ the premises Of homage and I know not how much tribute, Should presently extirpate me and mine Out of the dukedom, and confer fair Milan, With all the honours on my brother: whereon, A treacherous army levied, one midnight Fated to the purpose, did Antonio open The gates of Milan; and, i’ th’ dead of darkness, The ministers for th’ purpose hurried thence Me and thy crying self.
There are no more uses of "treacherous" in the play.
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The road through Afghanistan’s Kabul gorge is even more treacherous than the Road of Death in Bolivia.
It’s a gorgeous beach, but the waves are treacherous in the water.