adj. 25B6; adjective STUPID, foolish, slow-witted, slow, dull-witted, unintelligent, ignorant, simple-minded; insensitive, imperceptive, uncomprehending; informal dim, dim-witted, dense, dumb, slow on the uptake, half-witted, brain-dead, moronic, cretinous, thick, dopey, dozy, wooden-headed, boneheaded; Brit. informal divvy; Scottish & N. English informal glaikit; N. Amer. informal chowderheaded.
clever.