1. comparative form of mirk; more dark, gloomy, or murky
Usage: archaic or dialectal; chiefly British

1. one who or that which makes something dark or murky
Usage: rare; archaic

Examples

• The mirker shadows of the forest made it difficult to see the path.
• As evening fell, the sky grew mirker and more ominous.
• The mirker depths of the ocean remain largely unexplored.
• Winter brought mirker days and longer nights.