The phrase "most trinal" refers to something that is characterized by three distinct elements or parts. Synonyms for this phrase could include "tripartite," "trichotomous," or "threefold." These words all describe something that is composed of three parts or has three components. Other possible synonyms for "most trinal" might include "triune," which implies a unity of three parts, or "triadic," which suggests a relationship between three things. Whether you're writing about mathematical concepts, religious beliefs, or any other topic that involves the number three, using one of these synonyms for "most trinal" can help add precision and clarity to your language.