なぜ - Wiktionary, the free dictionary This term is often spelled in kana This word mainly belongs to formal (e g academic essays) and written (e g song lyrics) language, and might sound appropriately stiff or poetic in spoken language, even 丁寧語 (polite language), if it is in a context where formal style is not normally used The synonym befitting most contexts is どうして
Japanese Words for Why: Difference Between なぜ, どうして and なんで The difference between なぜ (naze), どうして (doushite) and なんで (nande) is that なぜ is a more formal term for asking why and is purely an inquiry about the reason or cause of something, whereas どうして and なんで are casual terms which can be used to convey a speaker’s emotion when asking why
Whats the difference between なぜ、どうして and なんで when meaning why? From dictionary@goo: なぜ is for asking 理由 (reason motive) and 原因 (cause) どうして covers なぜ usage, plus 方法 (method process) Also, there is additional usage as a strong way to refuse なんで covers なぜ and どうして usage, including the usage as a strong way to refuse So I guess どうして and なんで are interchangeable while なぜ has a smaller scope
なぜ・どうして・なんで JLPT - 日本語文法 【訳文】「なぜ」「どうして」「なんで」are interrogative words used to ask about reasons or causes There is no significant difference in meaning, but there are slight differences in nuance and usage 「なぜ」is formal and often seen in written language, especially when asking for logical explanations
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