既き存そん

noun which may take the genitive case particle 'no', noun, noun or participle which takes 'suru', intransitive verb

existing; pre-existing

Refers to something that already exists, especially in contrast to something new. Commonly used in business, technology, and formal contexts.

• 既き存そんのシステムを新あたらしいものに置おき換かえる。

  Replace the existing system with a new one.

• この機き能のうは既き存