收音机
shoū yīn jī · HSK 3
radio
📻 收音机 = receive + sound + machine
收 (receive/collect) + 音 (sound) + 机 (machine) = a machine that receives sound, i.e. a radio. The same 机 shows up in 飞机 (airplane) and 手机 (cellphone).
收 — 丩 (jiū, cord/bind) + 攵 (rap/strike, action)
Originally written 收, this character combines 丩 'twisted cord' as the phonetic with 攵 'a hand holding a stick' as the semantic, depicting the action of binding up captives or gathering things together by force. The core sense 'to gather, collect, harvest' grew naturally from this image of rounding up and tying.