anrōllōl
The third sentence of the 2nd Inverse Relay text:
la jalāeþa jarōllōl ewaþ ñi liēþ rā jalāe ālme;
jarōllōl is the inanimate singular form of the attribute anrōllōl which means “covered with snow”. Here it is modifying jalāeþa to make the phrase jalāeþa jarōllōl or “snow-covered mountain pass” or, since this is a la clause, “the mountain pass is covered with snow”.