To repair something in English, you would say "to fix" or "to repair." The verb "to fix" comes from the Old English word "fician," which means "to mend or repair," while the verb "to repair" comes from the Latin word "reparare," which means "to restore." Here are some examples of these verbs in use:

I need to fix my car's engine.

The plumber came to repair the leaky pipe.

Can you help me fix this broken chair?

The mechanics are repairing the damaged vehicle.

I'm going to fix the leaky faucet myself.

The appliance repairman is coming to fix the dishwasher.