Meaning of the Sanskrit Word: tustava

  tustava—he prayed    SB 1.9.31
  tustava—recited prayers    SB 3.33.1
  tustava—satisfied    SB 8.6.3-7
  tustava—pleased    SB 8.17.7
  tustava—he satisfied    SB 8.24.45

Can't find any compound Sanskrit words containing tustava.