| 1 | Italian | spaventoso | frightful, dreadful, frightening, terrible,... |
| 2 | Italian | spavento | fright, fear, scare, terror; first-person... |
| 3 | Italian | spaventare | to frighten, scare, spook |
| 4 | Vulgar Latin | expaventare | present active infinitive of *expaventō |
| 5 | Classical Latin | expaveō | — |
| 6 | Latin | pavor | The act of trembling, quaking, throbbing or... |
| 7 | Latin | -or | used to form a third-declension masculine... |
| 8 | Proto-Italic | -ōs | Creates masculine action nouns or result nouns... |
| 9 | Proto-Indo-European | -ōs | Creates masculine and feminine action nouns or... |
| 10 | Proto-Indo-European | -oss | — |
| 11 | Proto-Indo-European | -os | Creates action nouns or result nouns from verbs;... |