Latin word portus comes from Proto-Germanic *feraną, Proto-Indo-European - -tus, and later Proto-Indo-European *pértus (Crossing.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *feraną | Proto-Germanic (gem-pro) | |
| - -tus | Proto-Indo-European (ine-pro) | |
| *prē- | Proto-Indo-European (ine-pro) | |
| *pértus | Proto-Indo-European (ine-pro) | Crossing. |
| *portus | Proto-Italic (itc-pro) | Harbour. |
| portus | Latin (lat) | Harbour, port. Haven, refuge, asylum, retreat. Warehouse. |