共きょう同どう性せい

noun

cooperation; collaboration; jointness

Refers to the quality or state of doing something together, often used in formal or abstract contexts.

• このプロジェクトの成せい功こうには、チームの共きょう同どう性せいが不ふ可か欠けつだ。

  The team's cooperation is essential for the success of this project.