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!

Qenya 

helkelimbe

noun. *icicle, (lit.) ice-drop

An unglossed noun in The Etymologies of the 1930s (Ety/LIB¹), a combination of ᴹQ. helke “ice” and a variant of ᴹQ. limba “drop”, perhaps meaning “✱icicle”.

Conceptual Development: A word for “icicle” with a similar etymology appeared in the Qenya Lexicon: ᴱQ. liqilitl, a combination of ᴱ√LIQI “clear” and ᴱQ. litl “drop” (QL/54). This supports the notion that 1930s helkelimbe “✱ice-drop” might also be used for an icicle. In the Declension of Nouns from the early 1930s, however, “icicle” was ᴹQ. helen with stem-form helem- (PE21/34).

Elements

WordGloss
helke“ice”
limba“drop”