| Insertio | minionette |
| infertil | infertile |
| Insekt | insect bug |
| Inserat | advertisement |
| Inserent | advertiser |
| Inspektion | inspection |
| einseitig | onesided |
| assertiv | assertive |
| Assertion | assertion affirmation averment |
| Desertion | desertion |
| unfertig | crude |
| Intertrigo | intertrigo |
| einwertig | univalent monovalent |
| inert | inert |
| innert | inside |
| Ingestion | ingestion |
| Invention | invention |
| infektiös | infectious |
| Infektion | infection |
| Injektion | injection shot |