In a fantasmagoric manner; in a way that is wildly surreal, dreamlike, and bewilderingly changeable.
From fantasmagoric plus the adverbial suffix -ally. This adverb allows speakers to describe actions or events that unfold with the surreal, shifting quality of a fantasmagoria.
When we describe something as happening 'fantasmagorically,' we're reaching for language that breaks normal rules—linguists notice we do this most when trying to capture dreams and hallucinogenic experiences, which our brains literally process differently than reality.
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