Meaning of the Sanskrit Word: vidheyam

  vidheyam—something must be done    SB 8.7.38
  vidheyam—the predicate    Adi 2.74
  vidheyam—unknown subject matters    Adi 16.58
  vidheyam—to be done    Antya 1.184

Can't find any compound Sanskrit words containing vidheyam.