Apodeictically is a term that refers to a statement or argument that is unquestionably true. Synonyms of apodeictically include conclusively, undisputedly, undoubtedly, incontrovertibly, and irrefutably. All of these terms indicate that there is no room for doubt or argument. Other synonyms for apodeictically include ultimately, unambiguously, and decidedly. These words all convey a sense of finality and total conviction. To use any of these terms in a sentence is to make a statement that is unequivocal and impossible to dispute. When you need to express confidence in the truth of a statement, using one of these synonyms for apodeictically can help you convey your conviction clearly.