Just to emphasize this, the term "brutalist" derives from the French "brut", not English "brutal". "Brut" means "raw", and is used to describe the exposed concrete central to this style. Although both words derive from the same Latin word brutus, that word means both "heavy" and "stupid", with the French word deriving from the former and the English word deriving from the latter. (Or so Wiktionary tells me.)