Early Quenya
keres
noun. earthenware
kereksa
adjective. of earthenware
kereska
adjective. of earthenware
keresto
noun. potter
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!
A word appearing as ᴱQ. keres (kerest-) “earthenware” in the Qenya Lexicon of the 1910s under the early root ᴱ√KERE, with a shorter variant ᴱQ. kere that meant both “earthenware” and “earthen jar” (QL/46).
Neo-Quenya: For purposes of Neo-Quenya, I prefer ᴺQ. cemnassë “earthenware, pottery” as an adaptation of [N.] cevnas “earthenware” (EtyAC/KEM).