To mine using the technique of hydraulic mining.
"The riverbed was scarred by debris from a gold rush that used hydraulic power to wash away entire hillsides."
In plain English: To hydraulic means to use water pressure to move something heavy.
"The heavy gate began to hydraulic open after decades of neglect, slowly rising against its rusted hinges."
Usage: Use this verb only when specifically describing historical gold extraction methods that used high-pressure water jets to wash away hillsides. It is not applicable to modern machinery or general fluid power systems, which use "hydraulic" as an adjective instead.
moved or operated or effected by liquid (water or oil)
"hydraulic erosion"
"hydraulic brakes"
Pertaining to water.
"The hydraulic system in the old factory used high-pressure water to power the machinery."
The word hydraulic comes from the French hydraulique and originally Latin hydraulicus. It traces back to Ancient Greek hudraulikós, which described a water organ made of pipes.