Where does “hydrocoupling” come from?

hydrocoupling (English) comes from English coupling, from Middle English couplynge, from Middle English couplen, from Old French coupler, from Latin cōpulō, from Latin cōpula, from Latin coapula, from Latin apio — the god Apis.

Ancestry of “hydrocoupling”, step by step

hydrocoupling traces back through two separate lines of ancestry.

via English coupling

StepLanguageWordMeaning
1Englishcouplingpresent participle of couple; act of joining...
2Middle EnglishcouplyngeThe creation of a romantic or marital bond or a marriage
3Middle EnglishcouplenTo marry or wed; to join in a matrimonial union;...
4Old Frenchcoupler
5Latincōpulōto bind or tie together, unite, join, couple
6Latincōpulaa bond, tie, band or other connecting item
7Latincoapula
8Latinapiodative singular of apium; ablative singular of...
9Latinapiumparsley; celery; genitive plural of apis
10LatinApisA seaport town of Egypt situated at the borders with Marmarica
11Ancient GreekἌπις
12Copticϩⲁⲡⲉthe Apis bull, a bull worshipped as a herald of the gods (first Ptah, then Osiris, then Atum)
13Egyptianḥpthe god Apis

via English hydro

StepLanguageWordMeaning
1Englishhydrohydroelectric; hydroponic; hydroelectric power
2Ancient Greekὕδωρwater; rainwater, rain; sweat
3Proto-Hellenic*údōrwater
Every word from Egyptian ḥp
hydrocoupling — Etymology, Origin & Word History | Etymology Explorer