| Intensität | intensity intenseness |
| Integrität | integrity |
| Extensität | extension extensity |
| Intension | tenseness |
| Intensivtäter | repeat offender |
| Intimität | intimacy |
| intendiert | intended |
| intensiv | intensive intense |
| Innenstadt | downtown inner city |
| Ingeniosität | creativity |
| Inanität | inanity |
| Identität | identity |
| Infinität | uncertainty |
| Intercity | express train |
| Intransitiv | intransitive verb |
| intransitiv | intransitive |
| Intendant | artistic director theatre manager |
| Intention | intention |
| Interdikt | interdict |
| Internat | boarding school |