The phrase "throw light on" is commonly used to mean to make something clearer or more understandable. There are several synonyms for this phrase that can add variety and interest to your writing or speech. One option is "shed light on," which is a simple and effective replacement. Another is "cast light upon," which adds a bit of elegance to the phrasing. "Illuminate" conveys a sense of bringing clarity to a situation, while "clarify" is a more straightforward and direct substitute. Other possibilities include "explain," "elucidate," "explicate," and "unveil." Choosing the right synonym can enhance the impact of your message and engage your audience.