| unfathomable |
not able to be imagined or comprehended. [2 definitions] |
| unfavorable |
likely to have a bad result; inauspicious. [3 definitions] |
| unfeasible |
combined form of feasible. |
| unfeeling |
lacking physical feeling; insensate; numb. [2 definitions] |
| unfeigned |
not pretended or false; genuine; sincere. |
| unfeminine |
combined form of feminine. |
| unfenced |
combined form of fenced. |
| unfermented |
combined form of fermented. |
| unfertile |
combined form of fertile. |
| unfertilized |
combined form of fertilized. |
| unfetter |
to remove fetters from. [2 definitions] |
| unfilled |
combined form of filled. |
| unfinished |
not finished; incomplete. [3 definitions] |
| unfired |
combined form of fired. |
| unfit |
not suitable or appropriate for some purpose. [4 definitions] |
| unfix |
to unfasten; detach; loosen. [2 definitions] |
| unflagging |
not wavering or tiring; steady; persisting. |
| unflamboyant |
combined form of flamboyant. |
| unflappable |
not easily made excited or upset, esp. by a sudden crisis. |
| unflashy |
combined form of flashy. |
| unfledged |
of a bird, not yet having feathers developed enough for flight. [2 definitions] |