陰惨 (いんさん, insan) Japanese meaning: gloomy | KotomoraFreq.FrequencyTop 100,000 It was a room with a gloomy atmosphere.
The novel reaches a somber ending.
Etymology
Compound of 陰 (shadow, darkness) and 惨 (miserable, wretched). The combination conveys a sense of dark, oppressive sadness.