Meaning of the Sanskrit Word: prestham

  prestham—very dear    SB 4.6.29, Madhya 22.160
  prestham—the dearmost    SB 1.11.16, SB 1.11.17, SB 1.11.16-17
  prestham—first-class    SB 9.19.5, SB 9.19.6, SB 9.19.5-6

Can't find any compound Sanskrit words containing prestham.