/ ˈgɔːmləs; NAmE ˈgɔːrm-/ adjective
( BrE , informal ) stupid :
a gormless boy
Don't just stand there looking gormless—do something!
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WORD ORIGIN
mid 18th cent. (originally as gaumless ): from dialect gaum understanding (from Old Norse gaumr care, heed) + -less .