Meaning of the Sanskrit Word: nihsreyasam

  nihsreyasam—ultimately beneficial    SB 3.9.41
  nihsreyasam—the ultimate perfectional goal    SB 3.27.28-29
  nihsreyasam—the supreme benefit    SB 4.24.75
  nihsreyasam—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.