as·then·ic /æsˈθɛnɪk/
  (a.)衰弱的
  as·then·ic /æsˈθɛnɪk/ 形容詞
  無力的,虛弱的
  As·then·ic a.  Med. Characterized by, or pertaining to, debility; weak; debilitating.
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  asthenic
       adj 1: lacking strength or vigor [syn: adynamic, debilitated, enervated]
       2: having a slender physique