Meaning of the Sanskrit Word: prahasya

  prahasya—smiling    SB 3.15.11, SB 3.20.38, SB 4.1.29, SB 4.7.1, SB 5.4.3, SB 6.1.37, SB 6.17.9, SB 6.18.31, SB 8.9.8, SB 8.21.15 (and more...)
  prahasya—laughing    SB 8.12.14
  prahasya—after laughing    SB 9.3.31
  prahasya—heartily laughing    SB 3.19.1

Can't find any compound Sanskrit words containing prahasya.