| Insulinresistenz | insulin resistance |
| Inkonsistenz | inconsistency |
| Insistenz | insistence |
| Insulanerin | islander |
| Inlineskate | rollerblade |
| Infloreszenz | inflorescence |
| Resistenz | resistance |
| inkonsistent | inconsistent |
| Quintessenz | quintessence |
| Einschließen | enclosure |
| einschliessen | compose |
| einschließen | lock up include |
| Insuffizienz | insufficiency |
| einschreiten | intervene step in |
| insektenfressend | insectivorous entomophagous |
| insinuieren | insinuate |
| insistent | insistent |
| inspirieren | inspire |
| Maskulinistin | masculist |
| maskulinisieren | masculinize |