WordWeb Online

1. The quality of being difficult to direct or control by reason of complexity
   "avoiding the unwieldiness of formal legal processes"; "the onset of unwieldiness and bureaucracy in large organizations"
    
2. Trouble in carrying or managing caused by bulk or shape
   "the movers cursed the unwieldiness of the big piano";
   - awkwardness, cumbersomeness

Type of: inconvenience, troublesomeness, worriment [US, informal]