Gloomy countenance refers to a person's expression that indicates sorrow, sadness, and lack of cheerfulness. Some synonyms for this phrase include melancholy visage, doleful mien, mournful demeanor, and lugubrious look. These words capture the same emotional atmosphere as the term "gloomy countenance" but may add different nuances or connotations. Other synonyms include despondent countenance, crestfallen expression, and sorrowful appearance. These terms can all be used to describe someone's facial expression when they are feeling downcast or sad. Using a synonym can add variety and depth to your writing and help you capture the emotional nuances of a situation or character more precisely.