工具格 gōngjù gé
          
              gōngjù gé 
              
              noun 
              instrumental case 
              Domain: Linguistics 语言学
              
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                Notes: The form of a noun or related word to indicate that it is the agent of an action.  Common in older Indo-European languages, including Sanskrit (BUS 'Instrumental'; Lao 2004, p. 297; Wikipedia '工具格')