The phrase "by the" can be replaced with a variety of synonyms to achieve the same meaning in a sentence. Some possible options include "through the," "via the," "by way of the," "using the," "with the aid of the," and "by means of the." Each of these phrases conveys the idea of accomplishing a task or reaching a destination with the help of something or someone, or through a particular method or route. Choosing the right synonym for "by the" can add variety and interest to your writing while retaining clear communication.