基き本ほんルール

noun

basic rule; ground rule

Refers to a fundamental rule or principle, often in games, organizations, or procedures.

• ゲームを始はじめる前まえに基き本ほんルールを説せつ明めいします。

  I will explain the basic rules before we start the game.

• 会かい社しゃの基き本ほんルールを守まもって