Where does “lustrum” come from?
lustrum (Latin) comes from Old Latin loustrom, from Proto-Indo-European lewkstrom, from Proto-Indo-European lewk- — bright; to shine; to see.
Ancestry of “lustrum”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Old Latin | loustrom | — |
| 2 | Proto-Indo-European | lewkstrom | — |
| 3 | Proto-Indo-European | lewk- | bright; to shine; to see |