Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Gnomish

cuibri

noun. vitality

A word for “vitality” in the Gnomish Lexicon of the 1910s, a noun form of G. cuib “alive” (GL/27).

Neo-Sindarin: I would adapt this word as ᴺS. cuinas “vitality, liveliness”, based on the later adjective [N.] cuin “alive”.