A neologism for “opal” coined by Valerie on 2022-05-12 in the Vinyë Lambengolmor Discord Server (VLDS), a combination of inwis “change of mind” and sar (sarn-) “stone”, so “(lit.) mood-change stone”.
Quenya
ópa
noun. mouth (opening of which the lips are the edges)
inwissar
noun. opal, (lit.) mood-change stone
A word appearing in some 1964 notes on various elements of the mouth, specifically referring to the “opening of which the lips, or pempi, are the edges”, from the root √OP (PE17/126). Tolkien initially wrote (and then deleted) the form {ōka} and the root {√OK}. This is likely a technical term, as opposed to the more ordinary word for mouth: Q. anto.
Conceptual Development: A similar word ᴱQ. óvo or ó “mouth” appeared in Early Qenya Word-lists from the 1920s (PE16/136).