The story
- Proto-Indo-European*bʰeh₂-
- Proto-Indo-European*bʰh₂nyéti
- Proto-Hellenic*pʰáňňō
- Ancient Greekφαίνω (phaínō)
- Ancient Greekφαντάζω (phantázō)
- Ancient Greekφανταστικός (phantastikós)
- Late Latinphantasticus
- Middle Frenchfantastique
- Englishfantastic
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Englishfantastical
- English todayfantasticalness
From fantastical + -ness.
Etymology from Wiktionary, CC BY-SA 4.0.