Fetching details from the dictionary...

fleeting; transient; short-lived; momentary; ephemeral; fickle; vain
empty (dream, etc.); mere (hope); faint (possibility)
彼女は果敢無い希望を密かに抱いていました。
She secretly harbored fleeting hopes.
若い頃に見た夢は果敢無かった。
The dreams I had in my youth were fleeting.
長く語り継がれる物語は果敢無くない。
A story passed down for generations is not ephemeral.