What this suffix does
-grown forms compound adjectives that describe how or where something has grown, to what degree it has grown, or what has grown over it. Full-grown, home-grown, overgrown, wild-grown, fast-grown — each compound locates growth in a specific context or describes its quality and degree. In figurative use these compounds describe human development (full-grown, fully-grown), cultural origin (home-grown talent), and the taking-over quality of uncontrolled growth (overgrown). In literary writing they are used both precisely and metaphorically: an "overgrown" empire or an "overgrown" ambition both work on the principle of growth beyond appropriate limits.