unwieldy in WordNet English dictionary

1. lacking grace in movement or posture
   "a gawky lad with long ungainly legs"; "clumsy fingers"; "what an ungainly creature a giraffe is"; "heaved his unwieldy figure out of his chair"
   gawky  clumsy  clunky  ungainly  unwieldy 
   
2. difficult to use or handle or manage because of size or weight or shape
   "we set about towing the unwieldy structure into the shelter"; "almost dropped the unwieldy parcel"
   unwieldy  unmanageable 
   
3. difficult to work or manipulate
   "unwieldy rules and regulations"
   unwieldy