Final answer:
In Act III, Scene 4, 'diadem' is a type of crown, 'whet' means to sharpen or stimulate, and 'cleft' refers to a split or fissure.
Step-by-step explanation:
In Act III, Scene 4, the following words can be defined as:
- Diadem: A diadem is a type of crown or headband worn as a sign of sovereignty. It often denotes royalty and is a symbol of dignity or authority.
- Whet: To whet something means to sharpen it, as one would sharpen a knife. In a figurative sense, it means to stimulate appetite or desire.
- Cleft: A cleft refers to a split, gap, or fissure. It can be used to describe a division in a solid object or material.
An example of use in a sentence for diadem could be: 'The queen wore a magnificent diadem set with pearls and rubies'. For whet, one might say: 'The aroma of the freshly baked bread served to whet the guests' appetites'. And for cleft: 'The mountaineer carefully navigated across the cleft in the rock face'.