The kanji 投 means "to throw," "to cast," or "to hurl." It conveys the action of propelling something with force, often with the hand. This action implies a release or a sending forth of an object or idea. It can also extend to the action of entrusting something to someone or something.

・On-yomi (音読み): トウ (tou) ・Kun-yomi (訓読み): な(げる) (na(geru)) - to throw

⚫︎ 投げる Translation: To throw; to cast. ⚫︎ 投資 (とうし) Translation: Investment. ⚫︎ 投書 (とうしょ) Translation: A letter to the editor.

The kanji 投 is a phono-semantic compound (形声文字, けいせいもじ). The left side is the radical for "hand" (扌, てへん, tehen) which provides the meaning. The right side is the phonetic component, which provides the sound (pronounced as フ (fu) in ancient Chinese). The combination indicates the action of throwing something with the hand. The character developed from a pictograph showing a hand throwing an object.