Imaginitis

Other dislodged stones, however, convinced us the boys had not suffered from imaginitis[…]

"Just a case of galloping imaginitis! Would you suggest with this nonsense that we go back to peeling potatoes and cooking them over a coal stove?"

[T]wo of them look as healthy as mountain sheep, so they are suffering only from imaginitis but the third has trouble lowering herself down the steps so either she has very bad phlebitis or her womb is fallen.