雷同
léi tóng · HSK 7
mirroring others
⚡ 雷 thunder + 同 same: thunderclaps all sound identical, so it means copied alike
Old notion that thunder makes everything echo back the very same sound. So 雷同 (thunder-same) describes work or answers that mirror others identically, as if mindlessly copied.
同 — 冂 enclosure + 一 + 口 mouth
Originally depicted multiple mouths gathered under one cover or enclosure, suggesting people speaking together in agreement. From this image of voices joining, it came to mean 'same,' 'together,' or 'alike.' The shared cover symbolizes unity.