The phrase "on hands and knees" describes a particular position in which both hands and knees are touching the ground. It can be used to describe someone crawling, scrubbing a floor, or searching for something on the ground. Some synonyms for this phrase include "crawling," "creeping," "stooping," or "groveling." Other terms that could be used to describe a similar position include "bent over," "hunched," or "crouched." Whatever the reason for being on hands and knees, it's important to ensure that you take care of your body and don't put too much strain or pressure on your joints.