| Insolenz | boldness |
| Insolvenz | insolvency |
| insolent | ill-mannered impertinent insolent |
| Indolenz | idleness |
| insolvent | insolvent |
| indolent | indolent |
| Inserent | advertiser |
| Insistenz | insistence |
| Instanz | instantiate |
| Insulin | insulin |
| insofern | provided that |
| Solvenz | solvency |
| solenn | solemn |
| einölen | oil |
| Intoleranz | intolerance |
| Kondolenz | condolence |
| einholen | recover catch up lower |
| nölen | be slow dawdle grumble moan |
| Impotenz | impotence |
| Indulgenz | indulgence |