noun
faint reflection of light on water in the dark
Evokes a poetic, quiet scene where light is dimly reflected on water at night or in darkness.
夜の湖に水明かりがほのかに揺れていた。
A faint reflection of light shimmered on the lake at night.
Compound of 水 (mizu, 'water') and 明かり (akari, 'light'). The reading mizu changes to mizu due to rendaku.