In fact, if there could be any hope, it would be very ephemeral,
Marfa Petrovna had not the slightest intention of settling anything substantial on him, having regard for his children’s interests, and, if she left him anything, it would only be the merest sufficiency, something insignificant and ephemeral, which would not last a year for a man of his habits."
There are no more uses of "ephemeral" in the book.
Show samples from other sources
Her fame was ephemeral.
Her enthusiasm was as ephemeral as the morning mist.