perceptive Antonyms

unperceptive simple-minded ill-advised unobservant barmy kooky empty-headed at a loss at sea dopey boneheaded wooden witless slow slow-witted stupid thalian thick thoughtless unaware undiscerning vacuous thickheaded wooden-headed heavy-handed muttonheaded pea-brained screwy slow on the uptake soft in the head unperceiving unseeing dunce-like not the full shilling unintelligent imbecilic looney harebrained mentally retarded moronic nitwitted half-baked short-sighted birdbrained dunderheaded as silly as a goose absurd dense dim doltish