Where does “siúr” come from?
siúr (Irish) comes from Old Irish siur, from Proto-Celtic swesūr, from Proto-Indo-European swésōr, from Proto-Indo-European su-h₁ésh₂-ōr, from Proto-Indo-European h₁ésh₂r̥ — blood.
siúr (Irish): sister
Ancestry of “siúr”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Old Irish | siur | sister; kinswoman, female relation |
| 2 | Proto-Celtic | swesūr | sister |
| 3 | Proto-Indo-European | swésōr | sister |
| 4 | Proto-Indo-European | su-h₁ésh₂-ōr | — |
| 5 | Proto-Indo-European | h₁ésh₂r̥ | blood |