#ruxa- (2) vb. "crumble"; verbal stem only attested as a participle ruxal' "crumbling" in the Markirya poem, elided from *ruxala (since the next word begins in an a).
Quenya
ruxa
wroth
ruxa
adjective. wroth
ruxa-
verb. crumble
ruxa-
verb. to crumble
A verb for “to crumble” implied by (active-participle?) ruxal’ “crumbling” in Markirya poem of the 1960s (MC/222).
Conceptual Development: In versions of ᴱQ. Oilima Markirya from around 1930, Tolkien used (plural) ᴱQ. ruste for “crumbling” (MC/214).
rusca
wroth
rusca (1) adj. "wroth", also ruxa (PE17:188)
rusca
adjective. wroth
ruxa (1) adj. "wroth" _(PE17:188). _Also rusca.