pasmado
= stunned, astounded, flabbergasted, thunderstruck, gobsmacked.
Ex: She revealed that her first pregnancy had left her stunned.
Ex: Astounded and frightened by those shimmering tears, Leforte repeated her questions: "Bernice... Please... Is anything wrong? Can I help?".
Ex: They say they are flabbergasted and astounded by the decision to turn down their application.
Ex: The girl stared at him for a moment thunderstruck; then she lammed into the old horse with a stick she carried in place of a whip.
Ex: Recent statistics about the volume of junk e-mail are so astounding as to leave any reasonable person gobsmacked.
----
* quedarse pasmado = stun.