The captain was in the porch, keeping himself carefully out of the way of a treacherous shot, should any be intended.
He seemed under no apprehension, though he must have known that his life, among these treacherous demons, depended on a hair; and he rattled on to his patients as if he were paying an ordinary professional visit in a quiet English family.
There are no more uses of "treacherous" in the book.
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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.