Bears hibernate, so perhaps Heather’s description of Haber as “huge, like a grizzly bear” foreshadows Haber’s plans to “hibernate” by inducing an effective dream in himself once he’s finished using Orr. Haber is finally following through on his promise to cure Orr, despite Orr having asked for this since the very beginning of the novel. Ironically, Orr’s understanding of
iahklu’ seems to suggest that he no longer needs Haber to cure him—at least, not in the way he did at the start of the novel, when his main gripe with his dreams was their control over him. Now, Orr doesn’t have to worry about the impossible feat of controlling or suppressing his effective dreams, because he recognizes a third solution, which is simply to relinquish control, let the dreams be, and trust that their (and his) effortless participation in the larger universe will guide them where they’re meant to go. When Heather thinks she overhears Orr mumble the words “air per annum,” he’s actually saying
Er’ perrehnne, which is the term Orr learns from an Alien he sees in a dream, who teaches him to use the term to guide him through troubled dreams.