| Part of speech | common noun |
|---|---|
| Class | n‐class |
| Plural | siku |
| Danish | døgn |
|---|---|
| Dutch | etmaal |
| English | nychthemeron |
| Esperanto | tagnokto; diurno |
| Faeroese | samdøgur |
| Finnish | vuorokausi |
| German | <Zeitraum von 24 Stunden> |
| Icelandic | sólarhringur |
| Norwegian | døgn |
| Polish | doba |
| Portuguese | dia; <período de um dia e uma noite> |
| Russian | сутки |
| Spanish | día; 24 horas |
| Swedish | dygn |
| West Frisian | etmel |