Gonzalo wrote:The strenght of the young people.
Gonzalo wrote:As a noun, it is iuvenum for genitive plural. As an adjective, it is iuvenium.
I have learnt it by usage and not by grammar rules but I found anyway in my Latin lexicon what I have referred to and, besides, I have found the next reference -I have just written "iuvenis" at Google:
http://en.wiktionary.org/wiki/iuvenis Take a look.
Boban wrote:But if you reffering to noun "iuvenis, is, m." then genitive plural is "iuvenium" because iuvenis, is, m. is parisyllaba with genitive -is, so belongs to III-i declination.
Boban wrote:Difference betwen III declension and III-i declension is only in genitive plural ending.