impractical

> impracticable and impractical
impracticable and impractical are liable to be confused. Impracticable means "impossible to put into practice, not workable", as in "In theory the plan is fine but it is impracticable in terms of costs". Impractical means "not sensible or realistic", as in "It is impractical to think that you will get there and back in a day"; "not skilled at doing or making things", as in "He is a brilliant academic but he is hopelessly impractical".