The phrase "under it" can be replaced with several different synonyms, each with their own nuances. "Beneath it" is a straightforward option that highlights the physical location of something below another object or surface. "Amidst it" suggests that something is located in the midst of other things or experiences. "Below it" emphasizes the relative height of two objects or points. "Underneath it" is similar to "beneath it" but may be used more figuratively to describe hidden or underlying factors. Ultimately, the choice of synonym will depend on the context and intended meaning of the sentence.