A word for “circle” in Early Noldorin word-lists of the 1920s derived from primitive ᴱ✶kṛkta (PE13/140).
Early Noldorin
corn
noun. cheese
corn
noun. round ball
craith
noun. circle
crigen
adjective. circular
crithui
adjective. circular
A word for “circular” in Early Noldorin word-lists of the 1920s (PE13/141), apparently an adjective form of ᴱN. craith “circle” < ᴱ✶kṛkta from the same document (PE13/140).
Conceptual Development: The Gnomish Lexicon of the 1910s had G. crithog “circular” vs. noun G. crithos “a circle” (GL/27). Gnomish Lexicon Slips modifying that document instead had G. crithiol “circular” (PE13/111).
The word for “cheese” in the Gnomish Lexicon of the 1910s was G. cûr, related to G. caura “sour (of milk)” and derived from the early root ᴱ√TYURU “curdle” (GL/26, 28; QL/50). In Gnomish Lexicon Slips added to that document, “cheese” was instead cír from primitive ᴱ√tyus, with an alternate form cur written in pencil above it (PE13/113). In Early Noldorin Word-lists of the 1920s, “cheese” became ᴱN. corn from primitive ᴱ✶kyurna (PE13/140).
Neo-Sindarin: Of these, I prefer ᴺS. cûr for “cheese”, since ᴱN. corn “cheese” collides with later N. corn “round”. I assume ᴺS. cûr is derived from a Neo-Root ᴺ√KYUR “curdle”, perhaps from primitive ✱kyūrŭ.