"At the feet of" is a phrase that conveys the idea of someone being in a position of subservience or humility towards another person. There are several synonyms that can be used to describe this same sense of deference or respect. One such word is "prostrate", which refers to the act of lying face down on the ground in submission. Another synonym is "grovel", which suggests a more overt display of obsequiousness or servility. "Kowtow" is another word that has a similar meaning to "at the feet of", as it specifically refers to the act of bowing down and touching one's forehead to the ground as a sign of respect.