Perhaps she did not wish to answer a question so unanswerable.
Ought he not to have felt assured that I must have unanswerable motives for all that I had done?
It were to be wished, that this Objection were unanswerable.
I have nothing else to say; your arguments, Don Lope, are unanswerable.
But he had an alibi all the time, my child; an unanswerable alibi which he preferred ...