| infektiös | infectious |
| Infektiosität | infectiousness |
| Infektion | infection |
| Injektion | injection shot |
| Infekt | infection |
| Inflation | inflation |
| Reinfektion | reinfection |
| infertil | infertile |
| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |
| Inspektion | inspection |
| Invektive | invective scolding |
| injektiv | injective |
| Induktion | induction electromagnetic induction mathematical induction |
| Inunktion | embrocation unction |
| Ingestion | ingestion |
| Insertio | minionette |
| Invention | invention |
| Intention | intention |
| ingeniös | ingenious |
| Infestation | infestation |