The kanji 課 generally means "task," "section," "lesson," or "duty." It often implies a designated portion of something, a responsibility, or a specific segment of a larger whole. It can refer to assignments, classes, or even departments within an organization.

・On-yomi (音読み): カ (ka) ・Kun-yomi (訓読み): None

⚫︎ 宿題（しゅくだい）の 課題（かだい） Translation: Homework assignment ⚫︎ 化学（かがく）の 課目（かもく） Translation: Chemistry lesson/subject ⚫︎ 営業課（えいぎょうか） Translation: Sales department

The kanji 課 is a 形声文字（けいせいもじ） or phono-semantic compound. The phonetic component is 果（か - ka), which suggests the pronunciation. The semantic component is 言（げん - gen）or 言 (こと - koto), which implies speech, or words. The original meaning was related to assigning tasks or ordering something. The characters combined to express the concept of speaking and specifying a task or responsibility. This evolved into the more general meaning of "section," "lesson," or "duty."