红润
hóng rùn · HSK 7
ruddy
🍎 红 red + 润 moist/sleek = skin that's red and moist, i.e. a rosy healthy glow
红 is the red of 红色; 润 means moist or sleek (as in 滋润, moisturize). Put together they describe a complexion that is red and well-moistened, the look of glowing rosy cheeks. Said of a healthy, florid face.
红 — silk radical 糹/纟 + work 工 (phonetic)
红 is a semantic-phonetic compound. The silk radical 糹 (simplified 纟) signals the meaning, since the character originally referred to a kind of pink or light-red dyed silk. The right side 工 supplies the sound. Over time the meaning broadened from the dye color to 'red' in general.
润 — water radical 氵 + run/king 闰
A semantic-phonetic compound: 氵 (water) gives the meaning, while 闰 (rùn) supplies the sound. The original sense was 'to moisten' or 'to soak,' which extended to 'glossy,' 'sleek,' and figuratively 'to enrich' or 'profit.'