undurchführbar
Translation
impracticable, unfeasible, unworkable
Examples
Der Plan ist leider undurchführbar.
The plan is unfortunately impracticable.
Grammar Patterns
sth. is impracticable (something is not feasible) The plan is impracticable.
Similar Words
Synonyms: impracticable, unfeasible; Antonyms: feasible, practicable
Etymology
Etymology: `un-` (not) + `durch` (through) + `führbar` (feasible, from `führen` - to lead/carry). Literally 'not carry-through-able'.
Memory Tips
Think of trying to 'lead' (`führen`) a plan 'through' (`durch`) a solid wall. It's `un-` (not) possible.