制約（せいやく、seiyaku）
- restriction

The Japanese word 制約 制約 (seiyaku) generally means "restriction," "limitation," "constraint," or "condition." It refers to something that limits or restricts freedom, action, or the scope of something. It can apply to various contexts, from legal agreements to personal circumstances. The core idea is the imposition of a bound or a limitation on something. It often implies something that needs to be followed or obeyed.

⚫︎行動の制約 Translation: Restriction on behavior ⚫︎時間の制約 Translation: Time constraint/limitation ⚫︎契約には多くの制約がある。 Translation: The contract has many restrictions.

This word is a relatively formal term and is used in a variety of situations. It can be used in discussions about rules, regulations, agreements, or any situation involving limitations. It's common in business, legal, academic, and even everyday conversations where limitations are a central topic. When you want to emphasize a sense of being restricted, bound by rules, or having your choices narrowed, this is a suitable choice.

The word is typically written with the kanji 制 (sei - to control, to restrain) and 約 (yaku - agreement, promise, or to restrict). The reading is せいやく in hiragana. There are no other ways to write this word, and the okurigana (suffix hiragana) is standard and does not change. There are no variations in how it is written.

⚫︎ 制限 (seigen) - limitation, restriction ⚫︎ 規制 (kisei) - regulation, control ⚫︎ 限定 (gentei) - limitation, restriction ⚫︎ 束縛 (sokubaku) - restraint, confinement ⚫︎ 条件 (jōken) - condition ⚫︎ 拘束 (kōsoku) - constraint

⚫︎ 自由 (jiyū) - freedom ⚫︎ 解放 (kaihō) - release, liberation ⚫︎ 無制限 (museigen) - unlimited

このプロジェクトには、予算の制約がある。 ・Translation: This project has budget constraints. ・Explanation: This sentence illustrates how 制約 is used to discuss a budget limitation for a project.

この地域では、環境制約のために新しい建物の建設が難しい。 ・Translation: In this area, it is difficult to build new buildings because of environmental regulations. ・Explanation: This sentence demonstrates how 制約 can refer to restrictions imposed by environmental regulations.

The word 制約 is a compound word formed from the kanji 制, which carries the meaning of controlling or regulating, and 約, which relates to an agreement or restriction. The combination of these characters creates the meaning of controlling something by limiting its scope or setting conditions. The origin is Chinese, and the word came to Japan through the adoption of Chinese characters and language.