unservable
/ˌʌnsɜrvəbəl/Definitions
1. adjective
Not capable of being served or dealt with; impossible to satisfy or fulfill.
“The unservable demands made by the activist group hindered the negotiations.”
2. noun
Something that is unservable; a problem or need that cannot be met or fulfilled.
“The lack of funding was considered an unservable challenge for the charity.”