| 
| (animate noun) declension |  |
 
|  | indefinite | singular | plural |  
| absolutive | hipopotamo | hipopotamoa | hipopotamoak |  
| ergative | hipopotamok | hipopotamoak | hipopotamoek |  
| dative | hipopotamori | hipopotamoari | hipopotamoei |  
| genitive | hipopotamoren | hipopotamoaren | hipopotamoen |  
| comitative | hipopotamorekin | hipopotamoarekin | hipopotamoekin |  
| causative | hipopotamorengatik | hipopotamoarengatik | hipopotamoengatik |  
| benefactive | hipopotamorentzat | hipopotamoarentzat | hipopotamoentzat |  
| instrumental | hipopotamoz | hipopotamoaz | hipopotamoez |  
| inessive | hipopotamorengan | hipopotamoarengan | hipopotamoengan |  
| allative | hipopotamorengana | hipopotamoarengana | hipopotamoengana |  
| terminative | hipopotamorenganaino | hipopotamoarenganaino | hipopotamoenganaino |  
| directive | hipopotamorenganantz | hipopotamoarenganantz | hipopotamoenganantz |  
| destinative | hipopotamorenganako | hipopotamoarenganako | hipopotamoenganako |  
| ablative | hipopotamorengandik | hipopotamoarengandik | hipopotamoengandik |  
| partitive | hipopotamorik | - | - |  
| prolative | hipopotamotzat | - | - |  | 
Esperanto
Noun
hipopotamo (accusative singular hipopotamon, plural hipopotamoj, accusative plural hipopotamojn)
-  hippo; hippopotamus