(General American) IPA(key): /ˈɡɹʌmɚ/ <span class="searchmatch">grummer</span> comparative form of grum: more grum...
also grim, gram, grump. IPA(key): /ɡɹʌm/ Rhymes: -ʌm grum (comparative <span class="searchmatch">grummer</span>, superlative grummest) Morose, stern, surly, sullen. 1836, Joanna Baillie...