| unfähig | incapable incompetent unable |
| Unfähigkeit | inability |
| unflätig | foul |
| unfair | unfair |
| fähig | capable able competent |
| unruhig | restless |
| Unfug | devilry mischief |
| unfein | vulgar |
| unfertig | crude |
| unförmig | musclebound |
| Unfall | accident casualty |
| fünfzig | fifty |
| künftig | future upcoming forthcoming |
| zünftig | able decent |
| Anfahrt | approach |
| Anfang | beginning commencement onset start origin outset |
| Infamie | infamy |
| anfällig | susceptible vulnerable |
| befähigt | adept able |
| flugfähig | airworthy |