Phrasal verbs consists of a basic verb + another word or words. The two or three words that make up a phrasal verb form a short 'phrase' - which is why we call them 'phrasal verbs'.
Phrasal Verb:
burn something out
Meaning / Example:
1. to burn away the inside of something, getting rid of excess deposits. > The mechanic burned the carbon out of the manifold.
2. to wear out an electrical or electronic device through overuse. > Turn it off. You're going to burn the motor out!