impracticable
adjective /ɪmˈpræktɪkəbl/
  /ɪmˈpræktɪkəbl/
- impossible or very difficult to do; not practical in a particular situation
- It would be impracticable for each member to be consulted on every occasion.
 - This idea was considered completely impracticable.
 
Oxford Collocations Dictionaryverbs- be
 - prove
 - seem
 - …
 
- completely
 - quite
 - totally
 - …