困惑
kùnhuò · HSK 7
puzzled
😕 困 trapped + 惑 confusion = trapped in confusion, i.e. perplexed
困 (kùn) means stuck or trapped (a 木 tree boxed inside 囗 walls); 惑 (huò) is doubt or confusion built on 心 heart. Together: your mind is boxed in by doubt, so you feel puzzled.
困 — enclosure 囗 + tree 木
困 is an associative compound showing a tree (木) confined within an enclosure (囗), suggesting something hemmed in and unable to grow. From this image of restriction came the meanings 'trapped,' 'distressed,' and by extension 'tired' or 'sleepy,' as if one's energy were boxed in.