| čeština | ces-000 |
| nesnadný | |
| čeština | ces-000 | krušný |
| čeština | ces-000 | namáhavý |
| čeština | ces-000 | obtížný |
| čeština | ces-000 | perný |
| čeština | ces-000 | těžký |
| Deutsch | deu-000 | schwer |
| Deutsch | deu-000 | schwierig |
| English | eng-000 | arduous |
| English | eng-000 | difficult |
| English | eng-000 | hard |
| English | eng-000 | rugged |
| English | eng-000 | tough |
| English | eng-000 | uneasy |
| français | fra-000 | ardu |
| français | fra-000 | difficile |
| français | fra-000 | dur |
| italiano | ita-000 | alto |
| italiano | ita-000 | arduo |
| italiano | ita-000 | difficile |
| latine | lat-000 | difficilis |
| latine | lat-000 | per-arduus |
| Nederlands | nld-000 | lastig |
| Nederlands | nld-000 | slim |
| русский | rus-000 | затруднительный |
| русский | rus-000 | нелёгкий |
| русский | rus-000 | сложный |
| русский | rus-000 | трудный |
| español | spa-000 | difícil |