The word "of" is a very common preposition in English. It is used to indicate various relationships between words, such as:

Common meanings of "of":

1. Possession or belonging:
   • The coverof the book (the book's cover)
   • The legsof the chair (the chair's legs)
2. Part or component:
   • A pieceof cake (a part of the whole cake)
   • A memberof the team
3. Origin or source:
   • A manof France (a man from France)
   • The soundof music
4. Material or content:
   • A ringof gold (made from gold)
   • A cupof coffee
5. Measurement or quantity:
   • A literof water
   • A groupof people

Summary:

"Of" connects nouns to show relationships like possession, origin, composition, or quantity. It helps clarify how things are related in a sentence. If you'd like, I can provide example sentences or explain specific uses in more detail!