The antonyms for the word "most graspable" could include terms such as "complex," "ambiguous," "obscure," "confusing," or "incomprehensible." These words all suggest a lack of clarity or understanding, making them the opposite of graspable. On the other hand, words like "intuitive," "straightforward," "simple," or "transparent" might be considered synonyms for "most graspable." Each of these words implies a level of ease or accessibility when it comes to understanding information or concepts. By understanding the antonyms of "most graspable," we can gain a clearer sense of the qualities and attributes that make it possible for information to be understood and retained.