monofunctional

Etymology tree
Proto-Indo-European *mender.
Proto-Hellenic *mónwos
Ancient Greek μόνος (mónos)
Ancient Greek μονο- (mono-)der.
English mono-
Old French fonction
Middle French functionbor.
English function
Proto-Indo-European *h₂el-der.?
Proto-Italic *-ālis
Latin -ālisbor.
Old French -albor.
▲
Latin -ālis
Old French -elbor.
▲
Latin -ālisbor.
Middle English -al
English -al
English functional
English monofunctional
From mono- + functional.