There was no path down on to it save by flying; and no path down off it except by jumping over a precipice.
They it was who dislodged the goblins from the mountain-slopes, casting them over precipices, or driving them down shrieking and bewildered among their foes.
Goblins had scaled the Mountain from the other side and already many were on the slopes above the Gate, and others were streaming down recklessly, heedless of those that fell screaming from cliff and precipice, to attack the spurs from above.
There are no more uses of "precipice" in the book.
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She approached and then pulled back from the precipice.
She skied off a precipice, dropped her skis in midair, and then opened a parachute.