/euh pawl"/ , v.t.
to fill or overcome with horror, consternation, or fear; dismay: He was appalled by the damage from the fire. I am appalled at your mistakes. Also, appal .
[ 1275-1325; ME ap ( p ) allir to grow or make pale, equiv. to a- A- 5 + pal ( l ) ir in same sense; see PALE 1 ]
Syn . horrify, daunt. See frighten .