A noun for a “shingle, pebble bank” in The Rivers and Beacon-hills of Gondor from the end of the 1960s from primitive ✶sarniye, the basis for the river name S. Serni (VT42/11). Here the gloss “shingle” is used in the sense of a mass of smell pebbles rather than as a roofing tile. This word is an unusual example of a final -i in Sindarin, because the i was protected by the final e that was itself lost. Tolkien indicated it might instead be an adjective formation (“pebbly”?) from the (rare) adjective suffix -i derived from primitive ✶-īya, -ēya (VT42/10-11).