幻觉
huàn jué · HSK 7
hallucination
幻 (fantasy/illusion) + 觉 (perceive/sense) = a sensed-but-false thing
幻 means illusion or magic trick; 觉 means to perceive or sense. Together they name a perception with no real source behind it — what you seem to detect but isn't there.
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.