必ひつ要よう十じゅう分ぶん

na-adjective

necessary and sufficient

Used in logic, mathematics, and formal contexts to describe conditions that are both required and enough. In everyday language, it can mean 'just right' or 'exactly what is needed'.

• この条じょう件けんは必ひつ要よう十じゅう分ぶんです。

  This condition is necessary and sufficient.

• 必ひつ要よう十じゅう分ぶんな量りょうの水みずを加くわえてください。

  Please add a necessary and sufficient amount of water.