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'.
Phrasal Verb:
drop away
Meaning / Example:
1. to fall off; to fall away. > The leaves were still dropping away from the trees in November.
2. [for a group of people] to decline in number over time through disinterest or attrition. > His friends gradually dropped away as the years passed.