Gormless definition

gôrmlĭs

Lacking intelligence or vitality; stupid or dull.

adjective

(brit., informal) Slow-witted; stupid.

adjective

(chiefly UK, of a person) Lacking intelligence, sense or discernment, often implying lack of capacity of will to remedy the condition.

adjective

(UK) Inexperienced, naïve, innocent to the point of foolishness.

adjective

Origin of gormless

From dialectal gawm sense from Middle English gome notice from Old Norse gaumr

From American Heritage Dictionary of the English Language, 5th Edition
From English dialectal gaum (“understanding”) +‎ -less (“without”), ultimately from Proto-Germanic *gaumaz, *gaumō (“understand”). The ‘r’ found in this spelling is a vowel-lengthening device common in non-rhotic dialects of English.

From Wiktionary