etymologeek.com dictionary
English word fantasy comes from Ancient Greek (to 1453) (pronounced phaínō, meaning: appear, shine), and later Old French (842-ca. 1400) fantasie (imagination, concept, idea).

Fantasy etymology history?

Fantasy detailed word origin explanation

Dictionary entryLanguageDefinition
φαίνω Ancient Greek (to 1453) (grc)
φαντός Ancient Greek (to 1453) (grc)
φαντάζω Ancient Greek (to 1453) (grc)
φαντάζεσθαι Ancient Greek (to 1453) (grc)
phantasia Latin (lat) Fancy, idea, notion; fantasy. Imagination. Phantom, apparition. Phase (of the moon).
phantasia Late Latin (LL)
fantasia Malayalam (mal)
fantasie Old French (842-ca. 1400) (fro) Fantasy (imagination; concept; idea).
fantasy English (eng) (literary, psychoanalysis) To fantasize (about).. (obsolete) To have a fancy for; to be pleased with; to like. (literature) The literary genre generally dealing with themes of magic and the supernatural, imaginary worlds and creatures, etc.. (slang) The drug gamma-hydroxybutyric acid.. A fantastical design.. That which comes from one's imagination.

Words with the same origin as fantasy

Descendants of φαίνω
emphasis fancy phantom phenomenal phenomenon