fail

As they went along they chanced to pass a deep well, amply supplied with water, and when they saw it, one of the Frogs said to the other, “Let us descend and make our abode in this well: it will furnish us with shelter and food.” The other replied with greater caution, “But suppose the water should fail us.

Of this, however, be assured, that should any favorable opportunity present itself, I will not fail to offer you the choice of being present.”

Men of evil reputation, when they perform a good deed, fail to get credit for it.

“Is this,” said the Eagle, “the faithful fulfillment of your promise to me?” The Kite replied, “That I might attain your royal hand, there is nothing that I would not have promised, however much I knew that I must fail in the performance.”