limpid
Perfectly clear and easy to see through or understand.
Limpid describes something perfectly clear and transparent, like water so pure you can see straight through to the bottom of a stream. When water is limpid, it contains no mud, no cloudiness, no particles floating around. You might peer into a limpid pool and count every pebble on the bottom, or watch fish swimming as clearly as if you were underwater with them.
The word often describes water, but it can describe anything remarkably clear. A writer might have a limpid prose style, meaning their sentences are so clear and straightforward that readers understand exactly what they mean without confusion. A musician might produce limpid notes on a flute, each tone pure and distinct. A limpid explanation makes a complicated idea easy to grasp.
The word suggests a kind of beautiful, effortless transparency that goes beyond simple clarity. A glass of tap water might be clear, but a mountain spring bubbling up from rocks could be called limpid. There's something peaceful and refreshing about limpidity, whether you're describing a woodland creek on a summer day or someone's clear, direct way of explaining things.