投書
とうしょ · tousho · JLPT N2 · noun
editor
📮 投 = throw + 書 = writing: you throw your writing to the newspaper
投 means throw or cast, and 書 means writing or letter. A 投書 is a reader's letter thrown into a newspaper's mailbox for publication.
投 — hand radical 扌 + weapon 殳
Originally a pictograph of a hand (扌) throwing or hurling a weapon or staff (殳). The core meaning 'to throw, cast, hurl' extended over time to figurative senses like 'to invest,' 'to deliver,' or 'to throw oneself into' something.