| flachbrüstig | flat-chested hollow-chested |
| lachlustig | risible |
| fächerartig | fan-shaped fan-like flabellate flabelliform |
| flachshaarig | blond |
| flächenmäßig | in size in terms of surface area |
| Nachbrüten | musing |
| Nachrüsten | retrofit |
| nachrüsten | upgrade |
| Fachärztin | specialist |
| fachkundig | adept |
| Sichbrüsten | gloating |
| engbrüstig | wheezy |
| Fahrstil | style of driving |
| langfristig | long long dated |
| blaublütig | blue-blooded |
| fischartig | fishy |
| fluchtartig | hasty hastily hurried hurriedly |
| flüchtig | ephemeral |
| Flachheit | flatness |
| Flachsbreche | brake |