| Insuffizienz | insufficiency |
| insuffizient | insufficient |
| Suffizienz | sufficiency |
| Ineffizienz | inefficiency |
| suffizient | sufficient |
| ineffizient | inefficient |
| Herzinsuffizienz | cardiac insufficiency |
| inoffiziell | informal |
| Effizienz | efficiency |
| Insistenz | insistence |
| Süffisanz | presumption |
| Koeffizient | coefficient |
| effizient | efficient |
| infiziert | infected |
| Indifferenz | indifference |
| Sublizenz | sublicense |
| Insignien | regalia |
| Insektizid | insecticide |
| Insolenz | boldness |
| Insolvenz | insolvency |