They advanced slowly, for they had to pick their way through a pathless country, encumbered by fallen trees and tumbled rocks.
They reached the strip of dry land between the lake and the cliffs: it was narrow, often hardly a dozen yards across, and encumbered with fallen rock and stones; but they found a way, hugging the cliff, and keeping as far from the dark water as they might.
There are no more uses of "encumber" in the book.
Show samples from other sources
Digital distribution is encumbered by old copyright law.
Players complain they are encumbered by the new protective padding.