Answer: darkening

AnswerCrossword Clue
darkening(of such an emotion) Show in (someone's eyes or expression)
darkeningMake or become dark or darker
darkeningMake or become gloomy, angry, or unhappy
darkeningDARKEN, to make dark (having little light)
darkening(of an unpleasant event or state of affairs) Cast a shadow over something; spoil
darkening(of someone's eyes or expression) Show anger or another strong negative emotion