pellucid
adj.adj. very clear and easy to understand. You use this to describe light, water, or even a piece of writing that is perfectly simple and logical.
adj. translucent or transparent; easily intelligible in style or expression. Adjective, typically literary register.
The water in the mountain stream is pellucid and cold.
Despite the complexity of the legal case, the judge wrote a pellucid summary that anyone could follow.
The morning light filtered through the pellucid glass of the conservatory, illuminating every detail of the rare orchids without the harshness of the direct afternoon sun.
The adjective is a learned borrowing from Latin pellūcidus, perlucidus (“transparent, pellucid; very bright; very understandable”), from per- (prefix meaning ‘through; throughout; completely, thoroughly’) + lūcidus (“clear; full of light, bright, shining; (figuratively) easily understood, clear, lucid”) (from lūceō (“to shine; to become visible, show through; (figuratively) to be apparent, conspicuous, or evident”) (ultimately from Proto-Indo-European *lewk- (“bright; to see; to shine”)) + -idus (suffix meaning ‘tending to’ forming adjectives)). The noun is derived from the adjective. Cognates * Late Latin pellucidum (“transparent substance”) * Middle French pellucide (modern French pellucide (“pellucid”))