Meaning of the Sanskrit Word: upasrtya

  upasrtya—obtaining shelter at    SB 6.15.28
  upasrtya—reaching up    SB 5.26.33
  upasrtya—approaching    SB 4.12.22
  upasrtya—having approached nearer    SB 3.5.1

Can't find any compound Sanskrit words containing upasrtya.