健全
jiànquán · HSK 5
perfect
💪 健 (healthy) + 全 (whole/complete) = sound, in perfect shape
健 means healthy/robust; 全 means whole or complete. Together 健全 describes something that is sound, well-functioning, or in perfect working order — a system, body, or institution that is wholly healthy.
全 — enter 入 on top + jade 玉
Originally written as 入 (enter) over 玉 (jade), depicting a complete, unflawed piece of jade kept in storage. From this image of a perfect jade came the meanings 'whole,' 'complete,' and 'entire.' The top component is sometimes written as 人.