| Unterarm | forearm |
| Unterart | subspecies |
| unterer | lower |
| Hinterarm | upper arm |
| Unterarmtasche | clutch bag |
| Unterton | subharmonic |
| Unterwerk | substation |
| Unterzug | girder |
| untertan | subject |
| Untertan | subject |
| Unterbau | foundation |
| Untergang | downfall sinking decline |
| Unterhalt | alimony upkeep |
| Unterhaus | lower chamber lower house House of Commons |
| Unterhemd | undershirt |
| Unterlage | base pad underlay document paper root-stock |
| Unterlauf | lower reaches |
| Unterzahl | minority |
| unter- | under- |
| unter | below under among |