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DuckCorp Dico

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Found one definition 

  1.                 From German-Dutch FreeDict Dictionary ver. 0.1.5:
                

    
                
                  
    heftig /hˈɛftɪç/
1. acuut, helder, scherp, voorbijgaand
2. geweldig, heftig, hevig
3. druk, gejaagd, onrustig, rusteloos, woelig