The kanji character 胃 represents the "stomach." It refers to the organ in the body responsible for digesting food. This core meaning is central to all the words and usages that include this kanji.

・On-yomi (音読み): イ (i) ・Kun-yomi (訓読み): None

⚫︎胃 (i) Translation: Stomach ⚫︎胃痛 (itsū) Translation: Stomachache, abdominal pain ⚫︎胃カメラ (ikamera) Translation: Endoscope (for the stomach)

The kanji 胃 is a 形声文字 (keisei moji), a phono-semantic compound character. The character is composed of the radical 月 (tsuki/getsu), which depicts flesh or body, and 胃 represents a phonetic component. This indicates both the meaning and the sound.