The kanji 内 generally conveys the meaning of "inside," "within," "inner," or "internal." It suggests a location or state of being enclosed, contained, or hidden from view. It can refer to physical spaces, abstract concepts, or relationships.

・On-yomi (音読み): ナイ (nai) ・Kun-yomi (訓読み): うち (uchi)

⚫︎ 家内 (kanai) Translation: Inside the house; household ⚫︎ 内側 (uchigawa) Translation: Inside; interior; inner side ⚫︎ 内緒 (naichisho) Translation: Secret; privately; in confidence

The kanji 内 is a pictograph. It depicts the shape of an arrow 入 (nyū) entering into a container or vessel. The initial form of this character represents the idea of "inside" or "within" something. This gives the character the meaning of inside or the interior of something.