What does the word appall mean?

Usage examples for appall

  1. He had left Fernandon with courage and high hope to do battle; but now the helplessness of the situation threatened to appall him. – Lefty Locke Pitcher-Manager by Burt L. Standish
  2. But there was nothing to appall the experienced mountaineer with firm foot and a steady head, until they reached a height where the summit of the Jungfrau detached itself in apparently inaccessible isolation from all beneath or around it. – Louis Agassiz: His Life and Correspondence by Louis Agassiz
  3. But that they did is an established fact as there stand the houses which were built and occupied by human beings in the midst of surroundings that might appall the stoutest heart. – Arizona Sketches by Joseph A. Munk