" fatuous "

1: not having or showing an ability to absorb ideas readily;

  * e.g., " ... the fatuous questions that the audience members asked after the lecture suggested to the oceanographer that they had understood little "

•  Synonyms : 

•  airheaded,

•  birdbrained,

•  bonehead,

•  boneheaded,

•  brain-dead,

•  brainless,

•  bubbleheaded,

•  chuckleheaded,

•  dense,

•  dim,

•  dim-witted,

•  doltish,

•  dopey,

•  dorky,

•  dull,

•  dumb,

•  dunderheaded,

•  empty-headed,

•  gormless,

•  half-witted,

•  knuckleheaded,

•  lamebrain,

•  lunkheaded,

•  mindless,

•  oafish,

•  obtuse,

•  opaque,

•  pinheaded,

•  senseless,

•  simple,

•  slow,

•  slow-witted,

•  soft,

•  softheaded,

•  stupid,

•  thick,

•  thick-witted,

•  thickheaded,

•  unintelligent,

•  unsmart,

•  vacuous,

•  weak-minded,

•  witless

•  Antonyms : 

•  apt,

•  brainy,

•  bright,

•  brilliant,

•  clever,

•  fast,

•  hyperintelligent,

•  intelligent,

•  keen,

•  nimble,

•  quick,

•  quick-witted,

•  sharp,

•  sharp-witted,

•  smart,

•  supersmart,

•  ultrasmart

2: showing or marked by a lack of good sense or judgment;

  * e.g., " ... ignoring the avalanche warnings, the fatuous skiers continued on their way down the trail "

•  Synonyms : 

•  absurd,

•  asinine,

•  balmy,

•  barmy,

•  batty,

•  brainless,

•  bubbleheaded,

•  cockeyed,

•  crackbrained,

•  crackpot,

•  crazy,

•  cuckoo,

•  daffy,

•  daft,

•  dippy,

•  dotty,

•  featherheaded,

•  fool,

•  foolish,

•  fruity,

•  gaga,

•  half-baked,

•  half-witted,

•  harebrained,

•  inept,

•  insane,

•  jerky,

•  kooky,

•  loony,

•  loony tunes,

•  lunatic,

•  lunkheaded,

•  mad,

•  meshuga,

•  nonsensical,

•  nutty,

•  preposterous,

•  sappy,

•  screwball,

•  senseless,

•  silly,

•  simpleminded,

•  stupid,

•  tomfool,

•  unwise,

•  wacko,

•  wacky,

•  weak-minded,

•  witless,

•  zany

•  Antonyms : 

•  judicious,

•  prudent,

•  sagacious,

•  sage,

•  sane,

•  sapient,

•  sensible,

•  sound,

•  wise