hull (n.2)youdaoicibaDictYouDict
"body of a ship," 1550s, perhaps from hull (n.1) on fancied resemblance of ship keels to open peapods (compare Latin carina "keel of a ship," originally "shell of a nut;" Greek phaselus "light passenger ship, yacht," literally "bean pod;" French coque "hull of a ship; shell of a walnut or egg"). Alternative etymology is from Middle English hoole "ship's keel" (mid-15c.), from the same source as hold (n.).