必ひつ備び

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

indispensable; essential; necessary; must-have

Used for something that is absolutely required or cannot be done without. Often appears in formal or written contexts.

• このプロジェクトには彼かれの協きょう力りょくが必ひつ備びだ。

  His cooperation is indispensable for this project.