The phrase "tugs at" refers to a forceful or persistent pulling. Some synonyms for this phrase could include "yank," "pull," "drag," "wrench," and "tug on." These words all carry a similar connotation of a physical effort to move or lift something. Additionally, "tug at" can also refer to an emotional pull or a stirring of the heartstrings. In this context, synonyms could include "touch," "move," "stir," "affect," and "grab." These words all convey a sense of something emotionally powerful or compelling, much like the physical act of tugging at something.