Italian word ostile comes from Proto-Indo-European - -tis, Proto-Indo-European *gʰes-, and later Proto-Indo-European *gʰóstis (Enemy. Guest. Stranger, host.)
| Dictionary entry | Language | Definition |
|---|---|---|
| - -tis | Proto-Indo-European (ine-pro) | |
| *gʰes- | Proto-Indo-European (ine-pro) | |
| *gʰóstis | Proto-Indo-European (ine-pro) | Enemy. Guest. Stranger, host. |
| *hostis | Proto-Italic (itc-pro) | Stranger, guest. |
| hostem | Latin (lat) | |
| hostilis | Latin (lat) | Hostile. |
| ostile | Italian (ita) | Hostile (towards). |