既き成せい

noun which may take the genitive case particle 'no', noun

established; existing; ready-made

Describes something already formed, set, or in place, often contrasting with new or custom-made. Common in compounds like 既成事実 (established fact) and 既成概念 (preconceived notion).

• 既き成せいの枠わく組ぐみにとらわれずに考かんがえよう。

  Let's think without being bound by existing frameworks.