| 1 | English | fast | Firmly or securely fixed in place; stable; Firm... |
| 2 | Middle English | fast | fast |
| 3 | Old English | fæste | — |
| 4 | Old English | -e | forming adverbs from adjectives; -ly |
| 5 | Old English | -en | mæġþ + API → mæġden; cocc + API → cycen, cicen;... |
| 6 | Old Norse | -inn | Used to create adjectives from nouns, meaning... |
| 7 | Proto-Norse | -īna- | — |
| 8 | Proto-Germanic | -īnaz | -en |
| 9 | Proto-Indo-European | -iHnos | Creates adjectives of materials |
| 10 | Proto-Indo-European | -no- | adjectival suffix |