treacherous

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?”

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.

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