mirthless (adjective)

1. The mirthless, sterile design of the office space failed to inspire creativity and motivation among employees.

2. In the dystopian world of the novel, the inhabitants were forced to live in mirthless, joyless existence under oppressive rule.

3. According to Greek mythology, Hades ruled over the mirthless realm of the dead known as the Underworld.

4. The artist's dark, mirthless paintings depicted the melancholic aspects of everyday life, evoking a sense of existential despair.