noun, noun or participle which takes 'suru'
existing in full; remaining intact; fully preserved
Used for something that remains complete, undamaged, or in its original state. Often appears in formal or written contexts.
古文書が完存しているのは珍しい。
It is rare for ancient documents to remain fully intact.
この建物は創建当時の
This building remains almost completely in its original form from the time of its construction.