pure, clean, unspoiled
淨 centers on the idea of purity and cleanliness, free from dirt or contamination. The sense of being unspoiled extends naturally from that core idea of pristine clarity.
淨 combines 氵 (water) with 爭, which likely contributes the sound. The idea is that water cleanses and makes things pure.
Water 氵 beside 爭: imagine water being used to scrub away all impurities until only the pure, clean essence remains.
For ジョウ, picture a pure, clean showroom where everything sparkles: show -> ジョウ, and the water keeps it spotless.