| Unterlage | base pad underlay document paper root-stock |
| Unterlagen | document |
| Unterlauf | lower reaches |
| unterlegen | inferior |
| untersagen | ban |
| untertags | day daytime during |
| Unterlassen | omission |
| unterlassen | stop |
| Untermenge | subset |
| Unterzug | girder |
| unterlaufen | eviscerate |
| untertan | subject |
| Untertan | subject |
| Unterarm | forearm |
| Unterart | subspecies |
| Unterbau | foundation |
| Unterfangen | undertaking |
| Untergang | downfall sinking decline |
| Unterhalt | alimony upkeep |
| Unterhaus | lower chamber lower house House of Commons |