Where does “thirty” come from?
thirty (Middle English) comes from Old English þritig, from Old English þrī, from Proto-West Germanic þrīʀ, from Proto-Germanic þrīz, from Proto-Indo-European *tréyes.
Ancestry of “thirty”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Old English | þritig | thirty |
| 2 | Old English | þrī | — |
| 3 | Proto-West Germanic | þrīʀ | three |
| 4 | Proto-Germanic | þrīz | three |
| 5 | Proto-Indo-European | *tréyes | — |
Words derived from “thirty”