Kanji 再 again, twice, second time 築 fabricate, build, construct Related words 再さい 建けん 再建 is a broader term for rebuilding or reconstruction, often used for organizations, systems, or abstract things, while 再建築 specifically refers to the physical reconstruction of buildings.
改かい 築ちく 改築 means renovation or remodeling, implying changes to an existing structure, whereas 再建築 implies tearing down and building anew.
Etymology Compound of 再 (sai, 'again') and 建築 (kenchiku, 'construction, building'). The exact historical derivation is uncertain, but the word follows a common pattern of prefixing 再 to nouns to indicate repetition.
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