WordNet
n. reserves that do not show up on the balance sheet (as by understating values)
Usage examples of "hidden reserve".
You'll have to look within yourself for some hidden reserve of strength and endurance and will.
Jodi had never thought of herself as a patient person but since meeting up with Kelso she had discovered a hidden reserve of that precious commodity.
At last, calling on some hidden reserve of courage, he drew himself up to his full height—.
It was good, but unless Rickson could muster some hidden reserve Slade reckoned that Kilby would run out ahead of him.
The camerlegno spoke forcefully now, as though tapping a hidden reserve of power.
The President summoned up strength from some hidden reserve and gave a fine and apparently sincere performance.
He took a deep breath, inhaling some manner of sustenance from the ether, and appeared to be drawing on a hidden reserve of strength.
With infinite patience, dredged up from some hidden reserve in his body, he waited for the right moment, and when it finally arrived he was ready.
A hidden reserve of strength suddenly welled up inside Eragon, dredged from the deepest part of his being.