IPA: /ʌnˈmɛri/
KK: /ʌnˈmɛri/
Not cheerful or happy; feeling sad or gloomy.
The atmosphere at the party was quite unmerry due to the rain outside.
Unmerry → It is formed from "un-" (meaning not) and "merry" (from Old English *myrge*, meaning joyful or cheerful). The word "unmerry" means not joyful or cheerful.
Think of 'not' ('un-') being added to 'joyful' ('merry') — that's why unmerry means not joyful.