What is Depend ?
Depend is (verb) 1. to happen because of something or someone The success of the book will depend on the publicity campaign. I can’t be sure that we will come to lunch it depends on what time we get home from the party the night before. it (all) depends it is not certain (informal.) We may go to France on holiday, or Spain, it all depends. 2. to depend on someone or something to rely on or be sure of someone or something You can’t depend on Jack he’s always too busy to help. You can depend on her to do her best. The company depends on government grants.
source: Easier English, Student Dictionary Upper Intermediate Level