"Nef" is a word for boat with no "r" in it. (I also like barkentine.) A nef was also a technical term for a miniature boat which was placed in the center of the medieval king's or queen's table to hold napkins & such. In Breugel's great Epiphany painting, Melchior, the African wise man, is handing baby Jesus a green jewel-nef, with a tiny monkey peeking out of the cabin. Almost all the goofy onlookers are staring, not at Jesus, but at the nef.