hydrodynamical

Etymology tree
Proto-Indo-European *wed-
Proto-Indo-European *-r̥
Proto-Indo-European *wódr̥
Proto-Hellenic *údōr
Ancient Greek ῡ̆̔́δωρ (hū̆́dōr)
Ancient Greek ῠ̔δρο- (hŭdro-)der.
English hydro-
Proto-Indo-European *dewh₂-der.
Proto-Hellenic *dunamai
Ancient Greek δῠ́νᾰμαι (dŭ́nămai)
Ancient Greek δύναμις (dúnamis)
Proto-Indo-European *-kos
Ancient Greek -κός (-kós)
Ancient Greek -ικός (-ikós)
Ancient Greek δυναμικός (dunamikós)lbor.
French dynamiqueder.
English dynamic
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 dynamical
English hydrodynamical
From hydro- + dynamical.