| unbeugbar | indeclinable |
| unleugbar | undeniable |
| unbeugsam | grim |
| unbewegbar | inanimate |
| beugbar | inflectable declinable |
| unbenutzbar | unusable |
| unbrechbar | uncrackable |
| unbeirrbar | undeviating |
| unbesiegbar | invincible |
| unbrennbar | incombustible |
| unsagbar | preposterous |
| unwägbar | immeasurable unmeasurable |
| undenkbar | unthinkable |
| unessbar | inedible |
| unmessbar | immeasurable |
| unmeßbar | immeasurable |
| unfehlbar | infallible unfailing unerring |
| unheilbar | incurable irremediable irretrievable terminally |
| unlesbar | indecipherable |
| unteilbar | indivisible |