Where does “rarefien” come from?
rarefien (Middle English) comes from Old French rarefier, from Latin rarefacere — present active infinitive of rarefaciō; make rare.
Ancestry of “rarefien”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Old French | rarefier | — |
| 2 | Latin | rarefacere | present active infinitive of rarefaciō; make rare |