Meaning of the Sanskrit Word: pranasya

  präëasya—of the vital energy    SB 3.26.31
  präëasya—of vital air    SB 3.28.9
  präëasya—of Präna    SB 6.6.12
  präëasya—of life    SB 8.2.31

Can't find any compound Sanskrit words containing pranasya.