| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | kompleksa | kompleksaj |
| Accusative | kompleksan | kompleksajn |
| Afrikaans | kompleks |
|---|---|
| Dutch | complex; samengesteld |
| English | complex |
| German | komplex; zusammengesetzt; verwickelt; vielseitig; ungleichnamig |
| Low German | kompleks |
| Spanish | complejo |
| West Frisian | kompleks |