水気
みずけ · mizuke · JLPT N1 · noun
moisture
💧 水 (water) + 気 (air, spirit) = water in the air: moisture, dampness
水気 is 水 water plus 気 air or spirit, the water that hangs in the air. Don't confuse it with 湿気 (しっけ), a near-synonym for humidity.
水 — pictograph of flowing water
水 is a pictograph depicting a stream of flowing water, with the central line representing the main current and the side strokes showing splashing droplets or ripples. In oracle bone script it was drawn even more clearly as a wavy vertical line with branches. It retains its original meaning of 'water' and also serves as a radical, often appearing in the compressed form 氵.