Words many people don't know when reading David
There is a wish list - missing definitions you are very welcome to contribute
A very steep cliff; overhanging steep rock; brink of a disastrous situation
See Copperfield, ch. 55 - "There was a dark gloom in my solitary chamber, when I at length returned to it; but I was tired now, and, getting into bed again, fell - off a tower and down a precipice - into the depths of sleep" - and ch. 58 - "I had found sublimity and wonder in the dread heights and precipices, in the roaring torrents, and the wastes of ice and snow; but as yet, they had taught me nothing else."