The kanji 曹 generally carries the meaning of "a group," "a company," "a rank," or "a class." It often refers to a group of people, a department, or a position within an organization. It can also denote a place where people gather for specific purposes.

・On-yomi (音読み): ソウ (sō) ・Kun-yomi (訓読み): None, or very rare.

⚫︎ 曹長 Translation: Sergeant Major (Military rank). ⚫︎ 丞相 Translation: Prime Minister (Historically a high-ranking official). ⚫︎ 兵曹 Translation: Military Department (Historically, a governmental department).

The kanji 曹 is a phono-semantic compound (形声文字 - keisei moji). The top part is a variation of the character 业 (ye, which is related to "to sit" or "occupy"). The bottom component, 曰 (iwaku, to say), is thought to be the phonetic element, indicating the sound of the character. This combination suggests a place or group of people "occupying" or "in charge of" specific tasks, hence its meanings related to ranks, classes, and groups. Originally, 曹 was used to represent the different grades of officials.