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この本は不要だ。
This book is not needed.
Not necessary or needed; unnecessary.
この服はもう不要だ。
I don't need these clothes anymore.
この機能は不要です。
This feature is unnecessary.
Often used to indicate that something is no longer required or useful.
This phrase is often used to politely decline something that is not needed.
Composed of 不要 (fuyō, meaning 'unnecessary') and だ (da, a copula indicating a state).
Can be used in both formal and informal contexts. Often used to express that something is no longer needed or useful.