错觉
cuò jué · HSK 7
illusion
🪞 错 wrong + 觉 perception = a perception gone wrong
觉 means sense or perception — it also appears in 感觉 (feeling) and 知觉 (awareness). Prefix it with 错 (wrong/mistake) and you get a sense that misfired: an illusion or misconception.
错 — metal radical 钅 + 昔 (xī, former times)
A semantic-phonetic compound: 钅(金) 'metal' gives the meaning, while 昔 supplies the sound. It originally referred to gilding or inlaying metal, then extended to 'interweave, alternate,' and from 'crossed/mixed up' came to mean 'wrong, mistaken.'
觉 — see 见 + simplified 學 top 𭕄
觉 (traditional 覺) combines 學 (to learn, simplified to 𭕄) on top with 見 (to see) below, suggesting 'to perceive through learning.' Originally meaning 'to wake up' or 'become aware,' it extended to 'feel,' 'sense,' and 'sleep' (as in 睡觉). Read jué for awareness, jiào for sleep.