cloudiness, cloudy weather, fog (on a mirror, glasses, etc.), cloud (e.g. in marble), blur, mist, shadow, dimness, gloom, dejection
曇り空【くもりぞら】
cloudy sky, overcast sky
薄曇り【うすぐもり】
slightly cloudy
曇る【くもる】
to get cloudy, to cloud over, to become overcast, to cloud up, to fog up, to mist up, to become dim, to be gloomy, to be clouded (expression), to be downcast, to look slightly downward (of a noh mask; indicating sadness, grief, etc.)