A phrasal verb is a verb that is combined with another word (often preposition). The meaning of the phrasal verb can be very different from the meaning of the two words that it is made of.
Take off your hat inside.
Take off is a phrasal verb. It means remove.
There are a lot of phrasal verbs in English, and we use them frequently.
Lists of Phrasal Verbs
These lists include common phrasal verbs and their meanings: