The Japanese noun '付加 (ふか)' means 'addition'. It refers to the act of adding something to an existing entity, often to enhance or supplement it. This word is commonly used in contexts such as business, technology, or everyday situations where something extra is added. For example: The software includes additional features「そのソフトウェアには付加機能がある」(そのソフトウェアにはふかきのうがある). The price includes additional charges「その価格には付加料金が含まれている」(そのかかくにはふかりょうきんがふくまれている). It can also be used in abstract contexts, such as adding value or meaning.