須しゅ要よう

na-adjective, noun

absolutely necessary; essential; indispensable

Formal, often used in official or written contexts to describe something that cannot be done without.

• このプロジェクトには、彼かれの協きょう力りょくが須しゅ要ようだ。

  His cooperation is absolutely necessary for this project.

• 安あん全ぜん対