√OS root. “making a hissing foaming noise”
A root appearing in a list of “sound words” from 1959-60, described as “making a hissing foaming noise” and serving as the basis for the name Q. Ossë (PE17/138). This is only one of many different etymologies for that name, and I think it probably represents a transient idea.
References ✧ PE17/138, 171
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