Early Primitive Elvish
tyuru
root. curdle
kyuru
root. curdle
kyusu
root. curdle
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
This root first appeared in the Qenya Lexicon of the 1910s as ᴱ√TYURU “curdle”, with derivatives like ᴱQ. tyuru- “curdle” and ᴱQ. tyur “cheese” (QL/50). Derivatives also appeared in the contemporaneous Gnomish Lexicon such as G. cur- “curdle” and G. cûr “cheese” (GL/28). In Gnomish Lexicon Slips revising this document, “cheese” became cír derived from ᴱ√kyus (PE13/111) and Noldorin Word-lists from the 1920s had ᴱN. cír “sour, curdled” and ᴱN. cirtha- “to turn sour” from ᴱ√kyúr (PE13/140).
Neo-Eldarin: For purposes of Neo-Eldarin, I think it is worth positing a root ᴺ√KYUR “curdle” to preserve these early “cheese” words.