拡張

かくちょう · kakuchou · JLPT N2 · noun

expansion

🎈 拡張 = 拡 (enlarge) + 張 (stretch): expansion is enlarging by stretching

拡 appears in 拡大 (enlarge) and 張 in 緊張 (tension). 張る means to stretch something taut, so 拡張 is stretching something wider.

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