| Part of speech | adjective |
|---|---|
| Hyphenation | se·ri·oz·a |
| Singular | Plural | |
|---|---|---|
| Nominative | serioza | seriozaj |
| Accusative | seriozan | seriozajn |
| Catalan | seriós |
|---|---|
| Czech | vážný |
| Danish | alvorlig |
| Dutch | ernstig; serieus; stemmig |
| English | earnest; serious; staid; grave; meaningful; solemn |
| Faeroese | álvarsamur |
| Finnish | vakava |
| French | sérieux |
| German | ernst; ernsthaft; gesetzt; seriös |
| Greek | σοβαρός |
| Icelandic | alvarlegur |
| Italian | serio |
| Low German | seriöös |
| Norwegian | alvorlig |
| Papiamento | serio |
| Polish | poważny |
| Portuguese | grave; sério; sisudo |
| Romanian | serios |
| Saterland Frisian | betoacht; iedenst |
| Spanish | formal; serio |
| Swedish | allvarlig |
| Turkish | ağırbaşlı |
| West Frisian | earnstich |