Meaning of the Sanskrit Word: samsiddhah

  saṁsiddhaḥ—matured    Bg 4.38
  saṁsiddhaḥ—so achieved perfection    Bg 6.45
  saṁsiddhaḥ—perfected    SB 6.4.43
  saṁsiddhaḥ—completely perfected    SB 6.16.50

Can't find any compound Sanskrit words containing samsiddhah.