出典:Wiktionary
From dialectal English gaum (“heed, attention”) + -less (“without”), from Old Norse gaum, from Proto-Germanic *gaumaz, *gaumō (“heed, attention”). The ‘r’ found in this spelling is a vowel-lengthening device common in non-rhotic dialects of English.
gormless (comparative more gormless, superlative most gormless)