The term "most biflected" refers to a word or language that has undergone the most changes in its grammatical structure over time. Synonyms for this concept include "highly inflected", "strongly declined", "richly inflected", "heavily marked", "fully declined", or "extensively conjugated". These terms are commonly used in linguistic studies to describe the degree to which a language relies on inflections or changes in word endings to convey meaning. Highly inflected languages such as Latin or Russian have more complex grammar rules compared to English, which relies more heavily on word order and auxiliary verbs. Understanding these synonyms can help linguists and learners appreciate the intricate variations of different languages.