Irrecoverable
 
irrecoverable
irrécouvrable adjectif ou adverbe,
irrécuperable adjectif ou adverbe
Exemple d'usage de irrecoverable
The German and Romanian formations suffered very high 
irrecoverable losses of ca.   ... German losses: 
Irrecoverable: 31700 Wounded: 33400 Total: 65100 ... 
(Crédit : Wikipedia)