Phrasal verbs are multi-word verbs that, like single-word verbs, convey action of the body or mind or occurrences. Phrasal verbs consist of a basic verb + another word or words, usually a preposition or adverb. Example: speak (basic verb) + up (preposition)
Phrasal Verb:
chain someone or an animal up
Meaning:
to bind someone or an animal in chains.
Example:
We will have to chain him up until the police get here.