What is the meaning of the word "abuse"?

Definitions:

a rude expression intended to offend or hurt noun
- When a student made a mistake the teacher spared them no abuse.
cruel or inhumane treatment noun
- the child showed signs of physical abuse
improper or excessive use noun
- alcohol abuse
to change the inherent purpose or function of something verb
- I was warned not to abuse the system.
to treat badly verb
- This boss abuses their workers for no discernible reason since it is counterproductive.
to use foul or abusive language towards verb
- I abused the police officer who issued the parking ticket.
to use wrongly or improperly or excessively verb
- You've abused my generosity more times than I should have allowed.