ルール（ルール、ruール）
- rule

The Japanese word ルール (rūru) means "rule," "regulation," "guideline," or "law." It generally refers to a set of principles or instructions that govern behavior or conduct, often within a specific context such as a game, organization, or social setting. The meaning of ルール can encompass both formal and informal rules.

⚫︎ゲームのルール Translation: Game rules ⚫︎会社のルールに従う Translation: To follow company rules. ⚫︎このクラブのルールは何ですか？ Translation: What are the rules of this club?

⚫︎ You use ルール in various situations, such as when discussing games, sports, organizational policies, or social norms. ⚫︎ It is a versatile word, appropriate in both formal and informal contexts. ⚫︎ It’s often used to establish expectations or explain how something should be done. ⚫︎ The word is often used to refer to a situation's established framework or code of conduct.

⚫︎ ルール is written in katakana. This is because it is a loanword from English ("rule"). ⚫︎ There are no other standard ways to write this word. ⚫︎ The okurigana (suffix hiragana) is not applicable because it's a loanword.

⚫︎ 規則 (kisoku) - Rule, regulation (more formal) ⚫︎ 規定 (kitei) - Regulation, provision ⚫︎ 法 (hou) - Law ⚫︎ 決まり (kimari) - Rule, decision (more common and less formal)

⚫︎ There aren't direct antonyms for ルール, but the concept of "breaking the rules" might be expressed using phrases like: ⚫︎ 違反 (ihan) - Violation ⚫︎ 破る (yaburu) - To break, to violate

この試合のルールは簡単です。 ・Translation: The rules of this match are simple. ・Explanation: This sentence describes the simplicity of the game's rules.

会社のルールを守らなければなりません。 ・Translation: You must follow the company's rules. ・Explanation: This sentence emphasizes the necessity of adhering to the regulations set by a company.

ルール comes directly from the English word "rule". The Japanese language often borrows words from English (and other languages) and adapts them to fit the Japanese phonetic system.