There are several synonyms for the phrase "lying still" that can be used to describe a person or object that is inactive or motionless. One commonly used synonym is "motionless," which refers to a complete absence of movement. Other synonyms include "still," "immobile," "stationary," "fixed," and "unmoving." These words are all useful for describing people or objects that are neither moving nor any visible signs that they might do so in the near future. Whether it's describing a sleeping cat or a calm lake, these synonyms offer a variety of ways to paint a vivid picture of objects that are at rest.