A word for “congruence” in Late Notes on Verb Structure (LVS) from 1969 as a plural variant of more commonly used osanwe “thinking together” = “communicating in thought without words or other signs” (PE22/158). Yosanwe is a combination of yo- “together (pl.)” and sanwë “thought”. Based on these definitions, I belief yosanwe means “congruence” in the sense of harmony or conformity of thoughts among multiple people, possibly with an aspect of mental communication when used in reference to Elves.