To fix:
* Arreglar un coche: To fix a car.
* Arreglar una computadora: To fix a computer.
* Arreglar un grifo: To fix a faucet.
To arrange:
* Arreglar una cita: To arrange an appointment.
* Arreglar un viaje: To arrange a trip.
* Arreglar una fiesta: To organize a party.
To mend:
* Arreglar un agujero: To mend a hole.
* Arreglar un vestido: To mend a dress.
* Arreglar una camisa: To mend a shirt.
To settle:
* Arreglar un problema: To settle a problem.
* Arreglar un conflicto: To settle a conflict.
* Arreglar una cuenta: To settle an account.
It's important to consider the context to understand the exact meaning of "arreglar". For example, "arreglar el cabello" means "to fix/style your hair" while "arreglar un problema" means "to settle a problem".