1. A sacred or private place. Sanctum sanctorum, the holy of holies.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• spectum,
• sactum,
• sanctury,
• santum,
• sanct,
• acctium,
• santrum,
• aantum,
• sancrum,
• sancrtum,
• sanctrum,
• sanktum,
• santlum,
• incetum,
• sancrus,
• sandctus,
• santim,
• innuctum,
• sanetiv,
• Sanlum

• sanctify,
• sanction,
• sanctuary,
• sanctimony,
• sanctity.

The adjective form of the word "sanctum" is "sanctified". It refers to something that has been made sacred or holy.