The Proto-Indo-European word *dhwésmi
Word *dhwésmi
Meaning to breathe, to be full of (wild) spirits
See also Proto-Indo-European: *dhwes- ‘to breathe’
Synonyms *pneu-, *k̂weshₓ-

Comments
Mallory J.P. and Adams D. (2006)

Other words that might be of interest
*ses- ‘to rest, to sleep, to keep quiet’