fantasticly

Etymology tree
Proto-Indo-European *bʰeh₂-der.
Proto-Hellenic *pʰáňňō
Ancient Greek φαίνω (phaínō)
Ancient Greek φαντάζω (phantázō)
Proto-Indo-European *-tis
Ancient Greek -τις (-tis)
Ancient Greek -σῐς (-sĭs)
Proto-Indo-European *-kos
Ancient Greek -κός (-kós)
?
Proto-Indo-European *-tós
Proto-Hellenic *-tós
Ancient Greek -τος (-tos)
▲
Ancient Greek -κός (-kós)
?
Ancient Greek -τικός (-tikós)
Ancient Greek φανταστικός (phantastikós)bor.
Late Latin phantasticusbor.
Middle French fantastiquebor.
English fantastic
Proto-Indo-European *leyg-der.
Proto-Germanic *līkąder.
Proto-Germanic *-līkaz
Proto-Germanic *-ê
Proto-Germanic *-līkê
Proto-West Germanic *-līkē
Old English -līċe
Middle English -ly
English -ly
English fantasticly
From fantastic + -ly.