| 1 | Middle English | gost | a spiritual being; angel, devil, spirit; soul of... |
| 2 | Old English | gāst | breath, soul, spirit, ghost, being |
| 3 | Proto-West Germanic | gaist | ghost, spirit |
| 4 | Proto-Germanic | gaistaz | terror, fear; spirit, ghost; mind |
| 5 | Proto-Indo-European | ǵʰeysd- | anger, agitation |