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

cuilog

adjective. alive, lively

A word appearing as G. cuilog “alive, lively” in the Gnomish Lexicon of the 1910s, an adjectival form of G. cuil “life” (GL/27). Tolkien specified that this word was “usually metaph[oric]”, so probably “lively” was a better translation than “alive”.

Neo-Sindarin: For purposes of Neo-Sindarin, I’d update this word to ᴺS. cuileb “lively” using the later adjective suffix -eb, but for “alive” I’d use [N.] cuin.

cuib

adjective. alive