He looked down the relentless stretch of tiled floor at the water-cooler, and assured himself that no tenant of the Reeves Building had a more expensive one, but he could not recapture the feeling of social superiority it had given him.
It was refined and optimistic; it was overpoweringly calm; it flowed on relentlessly, without one comma, till Babbitt was hypnotized.
Babbitt was conscious of how feeble he sounded, conscious of Gunch’s mature and relentless eye.
As it came relentlessly back to him he snarled, "I hate myself!
There are no more uses of "relentless" in the book.