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:
pile something up
Meaning / Example:
1. to crash or wreck something. > Drive carefully if you don't want to pile the car up. > The driver piled up the car against a tree.
2. to make something into a heap. > Carl piled all the leaves up and set them afire.