(relies, ~ing, relied)
Frequency: The word is one of the 3000 most common words in English.
1.
If you ~ on someone or something, you need them and depend on them in order to live or work properly.
They relied heavily on the advice of their professional advisers...
VERB: V on/upon n
2.
If you can ~ on someone to work well or to behave as you want them to, you can trust them to do this.
I know I can ~ on you to sort it out...
The Red Cross are ~ing on us.
VERB: V on/upon n to-inf, V on/upon n