argute

astute cagey canny crafty farsighted ingenious judicious keen penetrating perceptive probing prudent sensible sharp slick sly smart wily wise

acute artful astucious brainy calculating cunning cutting deep discerning discriminating foxy heady in the know inside knowing on the inside on top of perspicacious piercing profound quick-witted sagacious savvy shark slippery smooth streetwise tricky underhand up on wised up

blunt dull foolish honest idiotic ignorant inept obtuse senseless slow stupid unclever unintelligent unreasonable unstylish unwise

frivolous naive unthinking

deafening discordant earsplitting noisy piercing raucous sharp strident

blaring clanging penetrating piping screeching thin treble

acute blatant cacophonous clangorous ear-piercing high metallic

calm low mild moderate quiet soft