Meaning of the Sanskrit Word: sadho

  sadho—O great saintly person    SB 7.10.18, SB 8.16.17
  sadho—O sage    SB 1.1.11
  sadho—the great saint    SB 9.16.15
  sadho—O great, saintly person    SB 5.10.18
  sadho—O Vidura    SB 3.19.9
  sadho—O honest one    SB 3.4.12
  sadho—O good one    SB 3.5.18

Can't find any compound Sanskrit words containing sadho.