传输
chuánshū · HSK 6
transmit
📡 传 = pass/transmit + 输 = transport; together: send across
传 means to pass on or hand down (think 传统 tradition); 输 means to transport or convey (also 'lose' in games). Combined, 传输 is the technical term for transmitting data or signals from one point to another.
传 — person radical 亻 + 专 (zhuān)
Originally a phono-semantic compound: 亻 (person) gives the meaning 'to pass on' between people, while 専/专 supplied the sound. Early uses referred to relay stations and messengers carrying word from place to place, which broadened to today's senses of transmitting, spreading, and handing down (as in tradition or biography).
输 — cart 車 + 兪 (phonetic)
输 is a phono-semantic compound. The radical 車 (cart/vehicle) gives the meaning, originally referring to transporting goods by cart. The component 兪 supplies the sound. From 'transport' it extended to 'send/deliver', then by metaphor to 'lose' (as in handing over stakes in a game).