pickle
noun
°A cucumber preserved in a solution, usually a brine or a vinegar syrup.
"A pickle goes well with a hamburger."
°(Often in plural: pickles), any vegetable preserved in vinegar and consumed as relish.
verb
°To preserve food in a salt, sugar or vinegar solution.
°To remove high-temperature scale and oxidation from metal with heated (often sulphuric) industrial acid.