ur(u)- prefix denoting difficulty (PE17:154, 172), cf. urcárima, urucarin
uru noun "fire" (LT1:271)
úr noun "fire" (UR)This stem was struck out in Etym, but a word that must be derived from it occurs in LotR, so it seems that Tolkien restored it. Early "Qenya" also has Ûr, noun "the Sun" (also Úri, Úrinci ("k"), Urwen) (LT1:271). Cf. Úri.
urya-verb. be hot, to be hot
urya- vb. "be hot" (PE17:148), "burn" (intransitive) (LT1:271)
nárnoun. fire, fire (as element)
sá noun "fire" (LT1:265; "Qenya" spelling sâ. Rather nárë in LotR-style Quenya.)
hrai- prefix denoting difficulty (PE17:154, 185), cf. ur(u)-
ruinëfire, a blaze
ruinë noun "a fire, a blaze" (PE17:183). Compare nárë.