| improvisieren | improvise |
| improvisiert | ad lib |
| ironisieren | ironize |
| Improvisation | improvisation |
| implizieren | imply |
| imponieren | impress |
| importieren | import |
| imprägnieren | impregnate waterproof |
| profilieren | distinguish gain make one's mark profile |
| profitieren | profit |
| projizieren | project |
| provozieren | provoke |
| Iridisieren | iridescence |
| memoisieren | memoize |
| terrorisieren | terrorize |
| amortisieren | amortize pay itself off |
| heroisieren | heroize |
| hypnotisieren | hypnotize hypnotise |
| immunisieren | immunize make immune |
| inthronisieren | enthrone crown |