brainless C2+ Topic:Describing Qualities US /ˈbreɪnləs/ UK /ˈbreɪnləs/ See IPA manual Meanings 1 adj foolish or stupid; lacking intelligence It was a brainless mistake to leave the door unlocked. Thesaurus Synonyms 1 adj · foolish or stupid; lacking... stupidfoolishmindlesswitlesssenselessidioticdim ↔ Opposites intelligentcleverbrainysmart Word family Derived forms brainlesslybrainlessness Related forms brainbrainy Etymology AI details From brain + -less. Brain descends from Old English brægen ('brain'), from Proto-Germanic *bragną, of uncertain further origin. brægen Old English *bragną Proto-Germanic View etymology graph -> Topics Describing Qualities Word Formation & Derivatives External links Google Images Cambridge Dictionary Wiktionary # brainless **Type:** Word **Level:** C2+ **Part of speech:** adj **IPA (US):** /ˈbreɪnləs/ **IPA (UK):** /ˈbreɪnləs/ ## Meanings 1. foolish or stupid; lacking intelligence ## Examples - It was a brainless mistake to leave the door unlocked. ## Synonyms - stupid - foolish - mindless - witless - senseless - idiotic - dim ## Antonyms - intelligent - clever - brainy - smart ## Derived Forms - brainlessly - brainlessness ## Related Forms - brain - brainy ## Roots and Affixes - Root: brægen - Root: *bragną ## Etymology From brain + -less. Brain descends from Old English brægen ('brain'), from Proto-Germanic *bragną, of uncertain further origin. ## AI Etymology Brainless comes from brain + -less. Brain descends from Old English brægen ('brain'), from Proto-Germanic *bragną, of uncertain further origin. The historical trail runs through brægen in Old English and *bragną in Proto-Germanic. Morphologically, brainless is transparent: it draws on brain + -less. Used as an adjective, brainless now means "foolish or stupid; lacking intelligence", so the present definition can be read against the older forms and meanings. The same lexical family is also visible in derived forms such as brainlessly and brainlessness and related forms such as brain and brainy. That uncertainty is part of the entry: the safest account is the attested form and the limited comparisons preserved with it. ## Topics - Describing Qualities - Word Formation & Derivatives markdown