| Part of speech | adjective |
|---|---|
| Hyphenation | i·nert·a |
| Singular | Plural | |
|---|---|---|
| Nominative | inerta | inertaj |
| Accusative | inertan | inertajn |
| Catalan | inert |
|---|---|
| Czech | nehybný |
| Dutch | bewegingloos; energieloos; traag; inert |
| English | inert; indolent; sluggish |
| Faeroese | trekur |
| French | inerte |
| German | träge; reaktionsträge; inaktiv; inert; wehenschwach; untätig; regungslos; bewegungslos; Inert‐; Inertial‐ |
| Portuguese | inerte |
| Saterland Frisian | duulich |
| Spanish | inerte |