Where does “-isö” come from?
-isö (Finnish) comes from Vietnamese số, from French sœur, from Middle French soeur, from Old French suer, from Latin soror, from Proto-Italic swezōr, from Proto-Indo-European swésōr, from Proto-Indo-European su-h₁ésh₂-ōr — blood.
Ancestry of “-isö”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Vietnamese | số | number; size; amount; count |
| 2 | French | sœur | sister; nun |
| 3 | Middle French | soeur | sister |
| 4 | Old French | suer | nominative singular of seror; to dry |
| 5 | Latin | soror | sister; cousin, daughter of a father's brother;... |
| 6 | Proto-Italic | swezōr | sister |
| 7 | Proto-Indo-European | swésōr | sister |
| 8 | Proto-Indo-European | su-h₁ésh₂-ōr | — |
| 9 | Proto-Indo-European | h₁ésh₂r̥ | blood |