DuckCorp

DuckCorp Dico

(RFC 2229 compliant dictionary server)
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Found one definition 

  1.                 From Eurfa Saesneg, English-Welsh Eurfa/Freedict dictionary ver. 0.2.3:
                

    
                
                  
    invert /ɪnvˈɜːt/ <v>
gwrthdroi <v>