shrewd, smart, sharp, incisive, quick-handed, quick as thought, deft-handed, quickhanded, sure-handed, wise, more...

obtuse, dense, stupid, doltish

perspicacious, shrewd, canny, perceptive, discriminating, penetrating, keen, more...

more, least, french, few, former, usual

mentally acute,   smart choice,   cautiously shrewd,   not easily fooled,   sharp clever,   keen observer,   cleverly shrewd,   business wise,   sharp smart,   clever jn war