Where does “unfeasible” come from?
Unfeasible derives from English feasible, Latin facere meaning "to do," and Proto-Indo-European h₂ent- meaning "being," with the prefix un- negating the sense of being capable of being done.
unfeasible (English): Infeasible: not feasible
Ancestry of “unfeasible”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | English | feasible | Able to be done in practice |
| 2 | Anglo-Norman | fesable | feasible; doable; convenient |
| 3 | Old French | faisable | doable |
| 4 | Old French | faire | to do |
| 5 | Latin | faciō | — |
| 6 | Latin | -torium | nominative neuter singular of -tōrius; accusative... |
| 7 | Latin | -tōrius | — |
| 8 | Latin | -tor | -er |
| 9 | Proto-Italic | -tōr | — |
| 10 | Proto-Indo-European | -tōr | Derives agent nouns from verbs, denoting someone... |
| 11 | Proto-Indo-European | -tor-s | — |