2.
in a state of mental numbness especially as resulting from shock
was stupid from fatigue
同义词: dazed / stunned / stupefied
3.
lacking intelligence
同义词: unintelligentadj.愚蠢的;麻木的;乏味的
foolish / silly / asleep / mad
n.傻瓜,笨蛋
simple / turkey / put / fool / idiot.
推荐你看一下刘垚钺的博文,里面有单词记忆法,很不错。