Meaning of the Sanskrit Word: tasthusah

  tasthusah—not moving    SB 4.23.1, SB 4.23.2, SB 4.23.3, SB 4.23.1-3
  tasthusah—of the being that is dull or stationed in one place    SB 7.3.29
  tasthusah—of nonmoving things    SB. 6.3.12

Can't find any compound Sanskrit words containing tasthusah.