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 

salqe

noun. grass, grass, [ᴱQ.] long mowing grass

A noun for “grass” in The Etymologies of the 1930s derived from ᴹ✶SALÁK-(WĒ) (Ety/SALÁK).

Conceptual Development: The noun ᴱQ. salki “grass” appeared in the Qenya Lexicon and Poetic and Mythological Words of Eldarissa derived from the early root ᴱ√SḶKḶ (QL/84; PME/84), but it was -salke in ᴱQ. Andesalke “Africa, Long Grass” (QL/31; PME/31). ᴱQ. salqe appeared in Early Noldorin Word-lists of the 1920s as a cognate to ᴱN. halb “grass, long mowing grass” (PE13/147).