Meaning and Usage
"境界" (きょうかい) primarily means a physical or conceptual boundary or border. It is often used to describe geographical borders, such as between prefectures or countries, but also abstract boundaries like those between reality and dreams.
Common Collocations
- 境界線 (きょうかいせん): boundary line, often used in maps or legal contexts.
- 境界を越える: to cross a boundary, used literally or figuratively.
- 境界があいまい: unclear or blurred boundary, often describing abstract or psychological states.
Register and Nuance
"境界" is a neutral term suitable for both formal and informal contexts. It is commonly used in news, academic texts, and everyday conversation when discussing borders or limits.
Learner Tips
Be careful not to confuse "境界" with "協会" (きょうかい), which means "association" or "society". They sound similar but have very different meanings. Also, "境界" is more formal than "はざま" or "さかい" which can also mean boundary but are less common in formal writing.