keenest

anxious ardent avid eager fervent fierce impatient intense

alert animate animated devoted earnest intent interested spirited warm

agog appetent athirst breathless dying to ebullient fervid fond of gung ho impassioned lively perfervid sprightly thirsty vehement vivacious zealous

apathetic calm cool dispassionate indifferent peaceful unconcerned unenthusiastic

lethargic

blunt dull idiotic ignorant obtuse pointless reluctant stupid uninterested

acute intense strong

acid caustic cutting edged extreme fine honed penetrating pointed tart

incisive observant perceptive quick-witted razor-sharp sardonic satirical trenchant unblunted

dull mild moderate

blunt kind nice soothing sweet

idiotic ignorant obtuse pointless reluctant stupid unenthusiastic uninterested

astute discriminating quick sensitive sharp shrewd wise

Einstein discerning whiz

bright brilliant canny clever nobody's fool perceptive perspicacious sagacious sapient sharp as a tack

foolish ignorant lazy slow stupid unintelligent

blunt dull idiotic obtuse pointless reluctant unenthusiastic uninterested