treacherous

I was standing watching his pursuit with a mixture of admiration for his extraordinary activity and fear lest he should lose his footing in the treacherous mire, when I heard the sound of steps and, turning round, found a woman near me upon the path.

Oh, the heartless, treacherous scoundrels!” exclaimed Dantès, pressing his hand to his throbbing brows.

“You prefer, then,” said the abbé, “that I should bestow on men you say are false and treacherous, the reward intended for faithful friendship?”

By adopting this moniker, Clemens permanently tethered his literary persona to the comforting reassurance of safe passage on a treacherous river.