Where does “nonvalvular” come from?
nonvalvular (English) comes from English non, from French non, from Old French non, from Latin nōn, from Old Latin noenum, from Proto-Indo-European óynos — one; single.
nonvalvular (English): Not valvular
Ancestry of “nonvalvular”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | English | non | Obsolete form of none |
| 2 | French | non | no; not; a no, a negative response |
| 3 | Old French | non | no; not; Alternative form of nom |
| 4 | Latin | nōn | — |
| 5 | Old Latin | noenum | — |
| 6 | Proto-Indo-European | óynos | one; single |