Proto-Germanic: *gīsnan-, *gaisian-, *gaist=, *gaisk=
Meaning: fear, be afraid
Gothic: *us-gīsnan wk. `be astonished'; *us-gaisjan wk. `frighten'
Old Norse: geiska-full-r `voll Schrecken', NIsl geiski `Schrecken'
Old English: gǟstan `in Schrecken versetzen'
English: aghast, ghastly
