Resembling or characteristic of being glum; sad, quiet, and somewhat gloomy in appearance or demeanor.
From 'glum' + '-y' (adjective suffix meaning 'having the quality of'). This variant form emerged in dialectal English, particularly in British speech, around the 19th century.
Regional dialects created 'glummy' as an intensified version of 'glum'—it's the kind of word that feels more weighted, more serious, like the person isn't just sad but sad in a way that sticks around.
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