The word **健全** is formed as a compound of two meaningful characters: **健** (jiàn), which conveys notions of health, strength, and robustness, and **全** (quán), which means complete, whole, or entire. Together, they create a logical semantic combination where "completely strong" or "wholly healthy" extends metaphorically to describe systems, institutions, or functions that are **sound, well-established, and complete in all necessary aspects**, such as in 健全的制度 (a sound system) or 健全的人格 (a well-balanced personality).