1. Godan verb with 'ru' ending, Intransitive verb

   1.

   to get cloudy; to cloud over; to become overcast

2. 2.

   to cloud up; to fog up; to mist up; to become dim

3. 3.

   to be gloomy; to be clouded (expression); to be downcast

Example sentences

• マスクをつけると眼鏡が曇る。

  When I wear a mask, my glasses get steamed up.