Meaning of the Sanskrit Word: abhavasya

  abhavasya—of one who is never born    SB 3.4.16
  abhavasya—transcendental to material existence    SB 3.28.23
  abhavasya—of the unborn    SB 5.6.15
  abhavasya—of whom there is no birth, death or maintenance as for an ordinary being    SB 10.2.39

Can't find any compound Sanskrit words containing abhavasya.