磨损
mó sǔn · HSK 7
wear and tear
🪨 磨 grind/rub + 损 damage = damage from rubbing: wear and tear
磨 — stone 石 + hemp 麻 (phonetic)
A semantic-phonetic compound: 石 'stone' gives the meaning (grinding involves stones), while 麻 'hemp' supplies the sound. Originally referred to a millstone or the act of grinding grain, later extending to 'rub, polish, wear down' and figuratively 'to torment' or 'waste time'.
损 — hand 扌 + 员 (yuán, phonetic)
损 is a semantic-phonetic compound. The hand radical 扌 carries the meaning of an action done by hand, while 员 supplies the sound. Originally it referred to reducing or diminishing something by hand, which broadened to the modern senses of 'damage,' 'loss,' and 'harm.'