Nyōbō kotoba (Japanese: 女房言葉 or 女房詞, lit. 'woman's words') was a cant that was originally used by Japanese court ladies during the Muromachi era, and subsequently spread and came to be thought of as a general women's language. It consisted primarily of a special vocabulary of words for food, clothing, and other household items.^[1] Many of the created words were descriptions of the thing they were naming, whether that was a description of a characteristic, shape, color, or usage.

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Many nyōbō kotoba words were formed by adding the prefix o- (御), which indicates politeness,^[2] or by dropping part of a word and adding -moji (文字, lit. 'character, letter').

Some nyōbō kotoba passed into general usage and are today part of the standard Japanese language.

• Gender differences in spoken Japanese
• Japanese honorifics