"[whet] {one's} appetite" 的定义和意义

What is the origin of the idiom "whet one's appetite" and when to use it?

The idiom "whet one's appetite" is typically used to describe the act of increasing one's anticipation or craving for something, often in the context of food, experiences, or upcoming events.It has its roots in Middle English and has been in use for centuries to describe the act of sharpening one's appetite in the sense of increasing one's desire for food or other pleasurable experiences.