既成

1. Origins, structure, and basic meaning

• Structure: Written 既成 and read きせい, it describes a framework or idea already formed and established before the current discussion.
• Basic usage: It appears in rejecting fixed frameworks and reconsidering assumptions long taken for granted.

2. Common pitfalls and similar expressions

• Preexisting rather than merely familiar
  • The word stresses that the form or concept was already in place and shaping thought.