An unglossed root in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. oksa “joint” and ᴱQ. oswe¹ “hip” (QL/71). To salvage these words, I would revise this early root to ᴺ√OTH as a variant of ᴹ√OS “round, about” referring to a rotating joint. If you are not comfortable with this, derivatives of √LIM “link, join” might also be useable for joints, based on Q. málimë/S. molif “wrist, (lit.) hand-link” (VT47/6).