If it were so, I might have let alone Th’ insulting hand of Douglas over you, Which would have been as speedy in your end As all the poisonous potions in the world, And saved the treacherous labour of your son.
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.