hydrostaticity

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 *-teh₂
Proto-Indo-European *-ts
Proto-Indo-European *-teh₂ts
Latin -itāsder.
Old French -itebor.
Middle English -ite
English -ity
English hydrostaticity
From hydrostatic + -ity.