| Part of speech | adjective |
|---|---|
| Hyphenation | per·fid·a |
| Singular | Plural | |
|---|---|---|
| Nominative | perfida | perfidaj |
| Accusative | perfidan | perfidajn |
| Dutch | dubbelhartig; trouweloos; verraderlijk |
|---|---|
| English | treacherous; treasonous |
| Faeroese | svikafullur; ótrúgvur |
| French | traître |
| German | heimtückisch; hinterlistig; treulos; wortbrüchig |
| Hungarian | álnok |
| Papiamento | traidó |
| Saterland Frisian | luurich; luursk; fielainich; oolk; trjouloos; woudbreekelch |
| Spanish | pérfido; traidor |
| Swedish | förrädisk |
| West Frisian | ferriederlik; ferriedlik |