The antonyms for the word "unclearest" are "clear," "obvious," "distinct," "unequivocal," and "transparent." When something is clear, it is easy to see, understand, or perceive without any doubt or confusion. Similarly, when something is distinct, it is clearly recognizable and easily distinguished from other things. Unequivocal means something that is clear and cannot be interpreted in more than one way. On the other hand, transparent means easy to perceive or understand. Thus, these antonyms of "unclearest" mean that the information or the concept is easily understandable, definite, and conspicuous.