1.
If you describe an object, idea, or course of action as ~, you mean that it is not sensible or realistic, and does not work well in practice.
It became ~ to make a business trip by ocean liner.
? practical
ADJ: usu v-link ADJ, oft it v-link ADJ to-inf
2.
If you describe someone as ~, you mean that they do not have the abilities or skills to do practical work such as making, repairing, or organizing things.
Geniuses are supposed to be eccentric and hopelessly ~.
? practical
ADJ: usu v-link ADJ