Meaning of the Sanskrit Word: nihsreyasam

  niḥśreyasam—ultimately beneficial    SB 3.9.41
  niḥśreyasam—the ultimate perfectional goal    SB 3.27.28-29
  niḥśreyasam—the supreme benefit    SB 4.24.75
  niḥśreyasam—the supreme goal of life, namely the means of obtaining ecstatic love for the Supreme Personality of Godhead    SB 6.9.50

Can't find any compound Sanskrit words containing nihsreyasam.