The voice seemed far away and immeasurably dreary, sometimes high in the air and thin, sometimes like a low moan from the ground.
But so firmly fixed had the notion of the immeasurable wealth of the Bagginses of Bag End become that most found this hard to believe, harder than any other reason or unreason that their fancy could suggest: to most it suggested a dark and yet unrevealed plot by Gandalf.
Then at last his gaze was held: wall upon wall, battlement upon battlement, black, immeasurably strong, mountain of iron, gate of steel, tower of adamant, he saw it: Barad-dur, Fortress of Sauron.
There are no more uses of "immeasurable" in the book.
Show samples from other sources
"While I’m sure we’re all immeasurably relieved that you’ll be looking after the Blackthorn children," said Luke, "Helen is one of them.
Cassandra Clare -- City of Heavenly Fire
I settled into rituals, which improved the quality of my existence immeasurably.