Entry: quiescent (adj. / n.)
In context: "Hal sits on the floor, quiescent, chin on his chest, just thinking it's nice finally to breathe and get enough air."
Definition: A nice entry - given the context and character, a few of the definitions fit:
Other: a. In a state or condition of quietness; motionless; inactive; dormant.
b. Med. Of a disease or disease process: inactive.
†b. Of a person: silent, not speaking. Obs. rare.
3. Electronics. Corresponding to or characterized by the absence of an input to a device ready to receive one.
SNOOT score: 3
Source: Oxford English Dictionary