macmer (Hebrew #4548)
also (feminine) macmrah {mas-mer-aw'}; or micmrah {mis-mer-aw'}; or even masmrah (Eccles. 12:11) {mas-mer-aw'}; from 5568; a peg (as bristling from the surface)
KJV usage: nail.
Pronounce: mas-mare'
Origin: or micmer {mis-mare'}