"a pickle for fish or meat, generally of wine and vinegar with herbs and spices," 1704, from French marinade "spiced vinegar or brine for pickling," from mariner "to pickle in (sea) brine," from Old French marin (adj.) "of the sea," from Latin marinus "of the sea," from mare "sea, the sea, seawater," from PIE root *mori- "body of water." As a verb, "to steep in a marinade," from 1680s. Related: Marinaded; marinading.