Why this word is great
PROSOPOPESIS — [Noun] A sudden and profound change of an individual's personality, whether spontaneous or induced, as in hypnosis. From Greek prosopo- ("person, mask") + -poiesis ("making, creation"), introduced by French psychical researcher René Sudre; possibly influenced by προσωποποιία (prosōpopoiía, "dramatization, prosopopoeia"). Unlike "metagnomy" (which denotes paranormal knowledge) or "prosopopoeia" (which personifies abstractions rhetorically), prosopopesis is the unsettling alchemy of selfhood remade. It is the hypnotized subject speaking in a voice not their own, the quiet neighbor who wakes one morning convinced they are Napoleon, or the way grief can hollow out a face until even the mirror no longer recognizes it—proof that identity is less a fortress than a flickering candle, easily snuffed or relit by unseen hands.