lose courage

For fear that he should lose courage, he pushed against the door of the room, and entered without ceremony.

But he begins to lose courage when Felix plays his next move.

No matter, it does not lose courage; it will seek other channels.

Ian didn't lose courage, though; and soon after the great snub he contrived to work his way somehow to Edinburgh.

He silenced the clamour of his fervid imagination, and concentrated his thoughts on his determination not to lose courage.