| Informant | ear informant |
| Informantin | informant |
| Formant | formant |
| informell | casual informal |
| informiert | enlightened |
| Infant | infante |
| Informatik | computer science informatics computing information technology |
| informativ | informative |
| Format | shape |
| performant | performant with good performance |
| Ignorant | ignoramus ignorant person |
| ignorant | ignorant |
| invariant | invariant |
| Infrarot | infrared |
| infrarot | infrared |
| einförmig | humdrum monotonous |
| Infarkt | infarction |
| Inferenz | inference |
| Inferno | inferno |
| Information | information |