The difference between big, large and heavy

When modifying people, these three words have different meanings: big means grown up or a big shot, and large means tall and fat.

The basic meaning of heavy is "heavy", usually referring to the weight of an object. By extension, it can refer to people feeling mentally heavy, that is, "heavy, dull, melancholy", or it can also refer to the weather. "Gloomy". Extended meanings include "unusually large in strength, quantity or degree", "heavy", "cumbersome, clumsy", "severe, ruthless", "indigestible", etc.