There are numerous synonyms for the phrase "depended on it", which indicate a strong reliance on something or someone. Some of the most common synonyms include "counted on it", "relied upon it", "banked on it", "trusted in it", "hinged on it", and "leaned on it". Other synonyms to consider include "rested on it", "counted upon it", "believed in it", "bet on it", "expected it", and "placed faith in it". No matter which synonym you choose, they all convey a similar meaning that one's success or outcome is tied to a specific factor or individual.