of

preposition: used after certain adjectives or verbs to mark their object
- We spoke of the policy changes during lunch.
- She is proud of her achievements.
preposition: expressing the relationship between a part and a whole
- The lid of the jar was stuck.
preposition: expressing the relationship between a scale or measure and a value
- An increase of 25% was recorded.
preposition: indicating an association between two entities, typically one of belonging or possession
- She is a friend of mine.
preposition: indicating the cause or reason
- He died of a fever.
preposition: indicating origin or source
- The wines of France draw visitors from around the world.
preposition: composed or consisting of something
- A team of engineers presented the design.
preposition: expressing a characteristic or quality
- It was an act of bravery.