"See daylight" is a common phrase that is used to describe the moment when we finally understand something. This expression refers to a time when we finally see a solution or can see the end of a problem. There are several synonyms for the phrase "see daylight" including "see the light," "understand," "comprehend," "grasp," and "realize." These synonyms all suggest the same meaning that of gaining insight, clarity or finally understanding something that was once unclear. Using any of these synonyms will help you to express the idea of seeing daylight in a more varied manner and make your language more interesting and colorful.