lose spirit

And thus we are led, in another way, to lose spirit in matter.

Now Una, nobody knew why, began to lose spirit, and to grow pale.

Man after man dropped before the unseen shots, and the few remaining soon began to lose spirit.

After this the enemies began to lose spirit, and the friendly natives to take heart, and to hold us in greater esteem.

Dorothy will help me in everything; when I begin to flag, or to lose spirit, she will spur me on.