preposition
of
Used to express belonging, connection, contents, origin, or a part of a whole.
The roof of our house needs a few repairs.
Etymology
Old English of meant from or away from. Its relational uses developed from identifying a source or origin to marking belonging, contents, and part-to-whole connections.
More examples
- She is a close friend of my sister.
- He pours a cup of coffee.
- She studies the pottery of ancient Greece.
- I eat half of the sandwich.
Similar words
- from
- Marks a source or origin, not possession or contents.