| Czech | neschopný , neúčinný |
| Chinese (simplified) | 白费 , 无能 , 无能+的 , 白费+的 , 无益 , 无效 |
| English | ineffective ( ⊳ ⇔ ) , uneffective , ineffectual ( ⊳ ⊳ ) |
| Indonesian | terpercik , gagal |
| Italian | inefficace |
| Malaysian | gagal |
| See also: | inefficient inefficacious useless powerless idle |
| Attributes: | effectiveness |
| Similar to: | toothless unproductive |
| Antonym: | effective |
| Semantic Field: | alla |