Phrasal verbs are two or more words that together act as a completely new verb with a meaning separate from those of the original words.
take someone or an animal in
to provide shelter for someone or an animal.
When I needed a place to live, my uncle took me in.
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'.
A compilation of 50 phrasal verbs.