曇り【くもり】
cloudiness, cloudy weather, fog (on a mirror, glasses, etc.), cloud (e.g. in marble), blur, mist, shadow, dimness, gloom, dejection
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.)