undurchführbar
Translation
unfeasible, impracticable, unworkable
Examples
Der Plan ist leider undurchführbar.
The plan is unfortunately unfeasible.
Grammar Patterns
sth. is unfeasible (something is not feasible) The plan is unfeasible.
Similar Words
Synonyms: unfeasible, impracticable; 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.