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Use "treacherously" in a sentence
"After dominating the recent Chinese Grand Prix, a race run in treacherously wet conditions, Red Bull designer Adrian Newey was asked by Autosport's Edd Straw to explain why his car is so quick in the wet:"
"In short, it is this great plague of the world, deception, which takes wrong measures, and makes false musters almost in every thing; which sounds a retreat instead of a charge, and a charge instead of a retreat; which overthrows whole armies; and sometimes by one lying word treacherously cast out, turns the fate and fortune of states and empires, and lays the most flourishing monarchies in the dust."
"Some particular instances of their treachery are here given: There they dealt treacherously, that is, in the places hereafter named [1.]"