What does "mirthless" mean?

Lacking mirth; devoid of joy; sad.

What is a synonym for "mirthless"?

Common synonyms include: cheerless, discontented, dour, gloomy, grim, humorless.

/ˈmɝθləs/ adj

adj ·Rare ·Advanced level

Adjective

1
Lacking mirth; devoid of joy; sad.
"The laughter of man is more terrible than his tears, and takes more forms: hollow, heartless, mirthless, maniacal..."

Adjective

""Your sun has failed freshman English. I'm afraid he'll have to attend summer school," Tom's teacher said with a mirthless smile."

From Middle English myrtheles, equivalent to mirth + -less.