* Hoarseness can have many causes: Besides a cold, it can be caused by allergies, overuse of the voice, irritation from smoke or fumes, or even stress.
* Need more information: To determine the cause of hoarseness, you would need to know more about the person, such as their other symptoms, recent exposure to illness, or any history of allergies.
If you're concerned about someone's health, it's best to suggest they see a doctor for a proper diagnosis.