Meaning of the Sanskrit Word: usati

  uśatī—beautiful    SB 3.23.49
  uśatī—very beautiful    SB 4.26.26
  uśatī—attractive    SB 4.30.11
  uśatī—free from material contamination    SB 5.5.24
  uśati—in a neat and clean place    SB 10.8.31

Can't find any compound Sanskrit words containing usati.