hydrostatician

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 *steh₂-
Proto-Indo-European *stísteh₂ti
Proto-Hellenic *hístāmi
Ancient Greek ἵστημι (hístēmi)
Proto-Indo-European *-kos
Ancient Greek -κός (-kós)
Ancient Greek -ικός (-ikós)
Ancient Greek στᾰτῐκός (stătĭkós)der.
Latin staticusder.
English static
English hydrostatic
Proto-Indo-European *-nós
Proto-Italic *-nos
Latin -nus
Latin -ānus
Latin -iānusbor.
English -ian
English hydrostatician
From hydrostatic + -ian.