transformable

Etymology tree
Proto-Indo-European *terh₂-
Proto-Indo-European *-t
Proto-Indo-European *térh₂t
Proto-Indo-European *-ónts
Proto-Indo-European *tr̥h₂ónts
Proto-Indo-European *tr̥h₂n̥ts
Proto-Italic *trāns
Proto-Italic *trāns-
Latin trāns-
Ancient Greek μορφή (morphḗ)der.?
Latin fōrma
Latin fōrmō
Latin transformo
Old French transformer
Middle French transfourmerbor.
Middle English transformen
English transform
Proto-Indo-European *-tḗr
Proto-Indo-European *-dʰlom
Proto-Indo-European *-dʰlis
Proto-Italic *-ðlis
Latin -bilis
Latin -ābilis
Old French -ablebor.
Middle English -able
English -able
English transformable
From transform + -able.