| Unteroffizier | junior officer non-commissioned officer noncommissioned officer |
| Stabsunteroffizier | sergeant Sergeant |
| Unterfamilie | subfamily |
| Unterstützer | contributor |
| Unterkiefer | mandible lower jaw |
| Unterordner | subdirectory subfolder |
| Untersetzer | side table coaster |
| unterfliegen | fly below fly underneath |
| unterminiert | undermined |
| Subalternoffizier | subaltern |
| Offizier | officer commissioned officer mate piece |
| Stabsoffizier | field officer |
| Unterdrücker | oppressor |
| Unterhalter | entertainer |
| Unterlizenz | sublicense |
| Unterroutine | subroutine |
| Unterzeichner | signatory |
| Unterzeile | subheadline |
| unter Wasser | underwater |
| unterer | lower |