1. Antonyms for Bewilderingly include clearly, comprehensibly, straightforwardly, intelligibly, understandably, coherently, accessibly, plainly, explicitly and

2. Synonyms for Comprehensibly include understandably, intelligibly, clearly, coherently, plainly, lucidly, straightforwardly, legibly, accessibly and distinctly

3. 20 Whoever thoroughly understands a principle should be able to expound it intelligibly so that other people, non-experts, should understand it as well.

4. He was a natural linguist, and he kept notebooks, making a scientific study of the workers' slang or Argot, until he could talk quite intelligibly.