half-wit /ˈhæfˌwɪt, ˈhɑf-/
  魯鈍者,愚蠢者
  Half-wit n. A foolish person; a dolt; a blockhead; a dunce.
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  half-wit
       n 1: a person of subnormal intelligence [syn: idiot, imbecile,
             cretin, moron, changeling, retard]
       2: a stupid incompetent person [syn: dimwit, nitwit, doofus]