| fristlos | without notice without previous notice |
| geistlos | insipid |
| rastlos | restless |
| restlos | complete |
| trostlos | depressing hopeless bleak deprimente desperately boring |
| Frisör | haircutter |
| Frisöse | haircutter |
| Friktion | friction |
| Frist | period deadline time limit respite |
| Freistoss | free |
| Freistoß | free kick |
| lustlos | exanimate drowsy |
| fettlos | fatless |
| fruchtlos | ineffectual fruitless |
| drahtlos | wireless cordless |
| furchtlos | fearless unafraid |
| kraftlos | powerless |
| ratlos | at a loss helpless |
| zeitlos | classic timeless |
| Prostylos | prostyle |