| Unterbau | foundation |
| Unterbauch | lower abdomen underbelly |
| untertan | subject |
| Untertan | subject |
| Unterhaus | lower chamber lower house House of Commons |
| Unterlauf | lower reaches |
| Unterton | subharmonic |
| Unterzug | girder |
| unterer | lower |
| Unterarm | forearm |
| Unterart | subspecies |
| Untergang | downfall sinking decline |
| Unterhalt | alimony upkeep |
| Unterlage | base pad underlay document paper root-stock |
| Untermenü | submenu |
| Unterzahl | minority |
| unteilbar | indivisible |
| unter- | under- |
| unter | below under among |
| unterhalb | below beneath |