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翻訳　日本語　英語: ないしょで

辞書: main
ないしょで
副詞
1 confidentially, covertly, in camera, in private, off the record, privately.
2 confidentially, furtively, on the sly, sneakily, surreptitiously.
3 confidentially, in camera, in private, in secret, on the Q.T., on the QT, privately, secretly.