| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | konkava | konkavaj |
| Accusative | konkavan | konkavajn |
| Catalan | còncau |
|---|---|
| Czech | konkávní; vydutý |
| Dutch | concaaf; hol; holrond |
| English | concave |
| German | konkav; hohl; hohlgewölbt; nach innen gewölbt; Hohl‐ |
| Italian | cavo |
| Russian | вогнутый |
| Spanish | cóncavo |