grummer

/ˈɡrʌmər/
adjective
  1. Comparative form of grum: more gloomy, sullen, or surly.
    • The grummer teacher gave us even more homework.
    • She looked grummer than her friend, who was smiling.
    • After the rain started, his mood grew grummer than before.
What does "grummer" mean? | whatsthatwordmean | whatsthatwordmean