反馈
fǎn kuì · HSK 7
to send back information
🔄📢 fǎn (reverse) + kuì (to give) = give back = feedback
反 means to reverse or turn back, 馈 means to give or present. Together they literally mean to give something back — information sent back to the source, i.e. feedback.
反 — hand 又 under cliff 厂
Originally a pictograph of a hand (又) turning something over against a cliff or slope (厂), depicting the action of flipping or reversing. From this came the core meaning 'to turn over,' which extended to 'opposite,' 'contrary,' and 'rebel against.' The character is purely semantic, with no phonetic component.