Phrasal verbs are compound verbs that result from combining a verb with an adverb or a preposition. The resulting compound verb is idiomatic.
Phrasal Verb:
straighten someone out
Meaning / Example:
1. to make someone's body straight or orderly. > The undertaker straightened Sam out in his coffin.
2. to cause someone to behave better or to have a better attitude; to reform someone. > You are terrible. Someone is going to have to straighten you out!
3. to help someone become less confused about something. > Can you straighten me out on this matter?
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'.