Nevertheless, that a male dissembler who by deluging her with untenable fictions charms the female wisely, may acquire powers reaching to the extremity of perdition, is a truth taught to many by unsought and wringing occurrences.
There are no more uses of "tenable" in the book.
Show samples from other sources
Our position became less and less tenable.
How can a slave also be a brother? Christians began to see the situation as untenable.
Dinesh D’Souza -- What’s So Great About Christianity