| čeština | ces-000 |
| neúčinný | |
| čeština | ces-000 | bezvýsledný |
| čeština | ces-000 | inefektní |
| čeština | ces-000 | neefektivní |
| Deutsch | deu-000 | unwirksam |
| Deutsch | deu-000 | wirkungslos |
| English | eng-000 | forceless |
| English | eng-000 | futile |
| English | eng-000 | ineffective |
| English | eng-000 | ineffectual |
| English | eng-000 | inefficacious |
| English | eng-000 | inefficient |
| English | eng-000 | invalid |
| English | eng-000 | pointless |
| English | eng-000 | unavailing |
| English | eng-000 | uneffective |
| English | eng-000 | useless |
| English | eng-000 | void |
| français | fra-000 | inefficace |
| français | fra-000 | inopérant |
| italiano | ita-000 | inefficace |
| italiano | ita-000 | inoperante |
| latine | lat-000 | inactivus |
| Nederlands | nld-000 | ijdel |
| Nederlands | nld-000 | nutteloos |
| Nederlands | nld-000 | vergeefs |
| Nederlands | nld-000 | vruchteloos |
| русский | rus-000 | недействительный |
| русский | rus-000 | недействующий |