Probably a hook (the name of the sixth Heb. Letter) -- hook.
[וָו] noun [masculine] hook, pin or peg (etymology unknown) — plural absolute וָוִים Exodus 38:28; construct וָוֵי 27:10 5t.; וָיֵיהֶם 26:32 5t.; — only P, in description of tabernacle 26:32, 37; 27:10-11, 17; 36:36, 38; 38:10-11, 12, 17, 19, 28, the hooks or pegs of gold and silver, fastened on, or in, the posts of the tabernacle, to support the various hangings (curtains, screens, etc.)
וזר (√ of following; compare Arabic bear a burden, or be guilty, yet see Fl in De Proverbs 21:8).