| Instinkthandlung | act of instinct |
| Instinktbewegung | fixed action pattern |
| Instandhaltung | maintenance servicing |
| Nebenhandlung | incident |
| Kindesmisshandlung | child abuse |
| Luftbehandlung | air treatment |
| Misshandlung | abuse maltreatment mistreatment |
| Inselansammlung | archipelago |
| Instantnudeln | instant noodle |
| Instanziierung | instantiation |
| Instandsetzung | maintenance overhaul |
| Instinkt | instinct |
| Instinktverhalten | instinctive behavior |
| instand halten | maintain keep in good condition |
| instantan | instantaneous |
| instinktiv | instinctive |
| institutionell | institutional |
| inständig | urgent |
| Beanstandung | complaint |
| Indienststellung | commissioning |