投資
とうし · toushi · JLPT N1 · noun
investing
💰 投 = throw + 資 = capital: throw capital in to grow it = investment
投 means throw or cast, and 資 means funds or capital. Investing means throwing your funds into something so they grow. The same 投 appears in 投票, to throw a vote, i.e. to vote.
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.