unrealistic

Etymology tree
Proto-Indo-European *né
Proto-Indo-European *n̥-
Proto-Germanic *un-
Proto-West Germanic *un-
Old English un-
Middle English un-
English un-
Proto-Indo-European *(H)reh₁-der.
Proto-Indo-European *(H)reh₁ís
Proto-Italic *reis
Latin rēs
Proto-Indo-European *h₂el-der.?
Proto-Italic *-ālis
Late Latin -ālis
Late Latin reālisder.
Old French reelbor.
Middle English real
English real
Proto-Indo-European *-id-
Proto-Indo-European *-yéti
Proto-Indo-European *-idyéti
Proto-Hellenic *-íďďō
Ancient Greek -ῐ́ζω (-ĭ́zō)
Proto-Hellenic *-tās
Ancient Greek -τής (-tḗs)
Ancient Greek -ῐστής (-ĭstḗs)bor.
Latin -istader.
Old French -istebor.
Middle English -ist
English -ist
English realist
Proto-Indo-European *-ikos
Proto-Italic *-ikos
Latin -icuslbor.
Old French -iquebor.
Middle English -ik
English -ic
English realistic
English unrealistic
From un- + realistic.