untraceable 

  1. 形容詞
難以捉模的, 難以尋找的

    
                        
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例句

                

                    
    
                                                    
  1. 
                                It also listed 2,635 people as untraceable .                            
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  2. 
                                In fact, the alleged Cunningham paper is untraceable .                            
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  3. 
                                The origin of Gajanan Maharaj is untraceable in history.                            
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  4. 
                                For some episodes, the sources Ovid used are untraceable .                            
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  5. 
                                The infiltration had been clean, her identity untraceable .                            
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