The antonyms for the word "more transpicuous" are "less clear" or "opaque." When something is less transpicuous, it means that it is less transparent or less easy to understand or perceive. So, if something is opaque, it is completely impenetrable, and it cannot be seen through. On the other hand, if something is less clear, it can still be understood somehow. In general, antonyms for "more transpicuous" suggest that whatever is being discussed is less accessible or less easily comprehended, so the opposite of transpicuity is obscurity or obtuseness.