| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | diagonalo | diagonaloj |
| Accusative | diagonalon | diagonalojn |
| Czech | diagonála; úhlopříčka |
|---|---|
| Dutch | diagonaal; hoeklijn |
| English | diagonal |
| German | Diagonale |
| Hungarian | átló |
| Portuguese | diagonal |
| Spanish | diagonal |