"Set the limit" is a phrase that refers to defining the maximum or minimum of something. However, there are plenty of other ways to express the same idea. For example, you could use phrases like "establish a boundary," "determine a cap," "impose a ceiling," "set a threshold," or "fix a parameter." Other synonyms might include "decide a limit," "designate a range," "prescribe a cutoff," or "specify a constraint." These terms all convey the idea of setting a limit, but with slightly different connotations and associations. Whether you're talking about financial matters, project goals, or personal boundaries, these synonyms offer a range of alternatives to make your language more varied and nuanced.