lucid

I adjective apparent, articulate, certain, clear, clear-cut, clear-minded, clear-thinking, clear-witted, clearheaded, comprehending, comprehensible, crystalline, diaphanous, discerning, discriminating, distinct, effulgent, evident, explicit, express, fulgid, illuminated, illumined, indisputable, intelligible, limpid, lucent, lucidus, luculent, manifest, nitid, obvious, overt, palpable, patent, pellucid, pellucidus, perceptive, perspicacious, perspicuous, perspicuus, plain, pronounced, rational, refulgent, responsible, sagacious, sage, sane, sensible, simple, sober, sound, straightforward, transparent, unambiguous, undeniable, understandable, understood, undisguised, unequivocal, unmistakable, unquestionable II index cognizable, coherent (clear), comprehensible, distinct (clear), evident, explicit, manifest, normal (sane), obvious, palpable, pellucid, rational, reasonable (rational), sane, unambiguous, unmistakable