thurrock

From Middle English thurrok, from Old English þurruc (“hold of a ship; bilge”), from Proto-West Germanic *þurruk, from Proto-Indo-European *terg-, *terǵ- (“to rub, wipe, clean, make holes”). Cognate with Saterland Frisian durk (“sewer, bilge-water, lowest part in the hold of a ship”), Middle Dutch durck, dorck (“the hold of a ship”) (Dutch durk, dork (“a spout-hole”)), Middle Low German dork (“keel room, the lowest part of a ship's hold”), Gothic 𐌸𐌰𐌹𐍂𐌺𐍉 (þairkō, “hole, eye (of a needle)”), Latin tergō, tergeō (“wipe, scour, clean”, verb), Old English þurh, þuruh (“through”). More at through, thorough.

来源：wiktionary