The word "ineffable" refers to something that cannot be expressed in words or is too great to be described. Some of the antonyms for this word are explicit, expressible, communicable, and articulate. These words indicate that whatever is being described can be clearly communicated in words or language. Other antonyms for ineffable may include understandable, clear, explicit, and intelligible. These words demonstrate that the concept or idea in question can be easily grasped and articulated by those who encounter it. Ultimately, the opposite of ineffable is something that is easy to understand, describe, and communicate.