Where does “quintile” come from?
Quintile comes from Latin Quintilis, derived from the Latin suffix -ilis combined with Latin quinque meaning five, ultimately from Proto-Indo-European pénkʷe.
Ancestry of “quintile”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | English | -ile | tending to, or capable of |
| 2 | Latin | -ilis | -ile |
| 3 | Proto-Italic | -elis | — |
| 4 | Proto-Indo-European | -elis | — |
| 5 | Proto-Indo-European | -lós | Forms agent nouns from verbal roots |