Untranslated in LotR, but written nora-lim and rendered as "ride on" in RS/196 (not a literal translation) and later translated as "run swift" in RC/195. A verb nor- is attested in the old Gnomish lexicon, PE/11:61, with the meaning "to run, roll"
Quenya
nor-
verb. run
yur-
run
yur- vb. "run" (quoted in form yurin, translated "runs", but within Tolkien's later framework it looks like a 1st person aorist "I run")-QL:106 (cf. entry YUR in Etym)