Index - U
| unLava | Lava.Internal |
| unLength | Data.Hardware.Internal, Data.Hardware, Wired |
| unless | Lava, Wired |
| unlineS | Data.Hardware.Internal |
| unOne | Lava.Internal |
| unpair | Lava.Patterns |
| unplaced | Layout.Internal, Layout, Wired |
| unport | Lava.Internal |
| unriffle | Lava.Patterns |
| Unspecified | Layout.Internal |
| unwordS | Data.Hardware.Internal |
| unzipp | Lava.Patterns |
| Upwards | Data.Hardware.Internal |
| upwards | Layout.Internal, Layout, Wired |
| upwards' | Layout.Internal, Layout, Wired |