Nail

nail /neɪl/n

1. a fastening device usually made from round or oval wire, having a point at one end and a head at the other
2. anything resembling such a fastening device, esp in function or shape
3. the horny plate covering part of the dorsal surface of the fingers or toes
   Related adjective(s): ungual, ungular
4. the claw of a mammal, bird, or reptile
5. a unit of length, formerly used for measuring cloth, equal to two and a quarter inches
6. hit the nail on the head ⇒ to do or say something correct or telling
7. on the nail ⇒ (of payments) at once (esp in the phrase pay on the nail)

vb (transitive)

1. to attach with or as if with nails
2. informal to arrest or seize
3. informal to hit or bring down, as with a shot
4. informal to expose or detect (a lie or liar)
5. to fix or focus (one's eyes, attention, etc) on an object
6. to stud with nails

Etymology: Old English nǣgl; related to Old High German nagal nail, Latin unguis fingernail, claw, Greek onux

ˈnailer