| ja x | 
         
            ― Synonym ⟶
         
        
            Weight: 2.0
         
     | 
    
        
 | 
    Source: JMDict 1.07 | ||
| fi tuntematon tekijä (n, event) | 
         
            ― Synonym ⟶
         
        
            Weight: 2.0
         
     | 
    
        
 | 
    Source: Open Multilingual WordNet | ||
| en unknown quantity (n, communication) | 
         
            ― Synonym ⟶
         
        
            Weight: 2.0
         
     | 
    
        
 | 
    Source: Open Multilingual WordNet | ||
| ja 未知数 (n, event) | 
         
            ― Synonym ⟶
         
        
            Weight: 2.0
         
     | 
    
        
 | 
    Source: Open Multilingual WordNet | ||
| zh 默默无闻 | 
         
            ― Synonym ⟶
         
        
            Weight: 1.0
         
     | 
    
        
 | 
    Source: CC-CEDICT 2017-10 | ||
| en unknown quantity (n) | 
         
            ― Synonym ⟶
         
        
            Weight: 1.0
         
     | 
    
        
 | 
    Source: English Wiktionary | ||
| zh 未知數 | 
         
            ― Synonym ⟶
         
        
            Weight: 1.0
         
     | 
    
        
 | 
    Source: CC-CEDICT 2017-10 | ||
| zh 默默無聞 | 
         
            ― Synonym ⟶
         
        
            Weight: 1.0
         
     | 
    
        
 | 
    Source: CC-CEDICT 2017-10 | ||
| zh 未知数 | 
         
            ― Synonym ⟶
         
        
            Weight: 1.0
         
     | 
    
        
 | 
    Source: CC-CEDICT 2017-10 | ||