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

glaimri

noun. serenity, fair weather

A word in the Gnomish Lexicon of the 1910s appearing as G. glaimri “serenity, fair weather”, an abstract noun form of G. glaim “serene, clear, fair (espec. of weather)” (GL/39).

Neo-Sindarin: If adapting this word to Neo-Sindarin, I would make it an abstract noun form based on Neo-Sindarin ᴺS. glaen “serene, fair (weather)”, hence: ᴺS. glaenas “serenity, fair weather”.

Cognates