There are several synonyms for the phrase "slice through" that convey the same action of cutting through something. One such synonym is "cut into," which implies making small incisions or creating a path through the material. "Carve a path" is another synonym, emphasizing the precision required to create a route through a particular object. "Sever" is a more forceful synonym, suggesting a clean break or separation. "Slice apart" is a similar phrase that conveys the idea of cutting through something, but with a more aggressive tone. Finally, "chop through" implies a forceful or sudden movement, similar to the action of an axe or a cleaver.