fingernail

Your fingernails are the hard, protective plates at the tips of your fingers. They are made of keratin, the same protein found in your hair. People often think of them as something to paint or decorate, but they also do important work: they protect the sensitive skin underneath and help you do small, careful actions. Think about how much harder it would be to pick up a tiny coin without them. Figuratively, if you are barely managing to survive or stay in a difficult situation, you might say you are "hanging on by your fingernails."

Fingernails are more than just something people paint or trim. They are hard, curved plates at the ends of the fingers, and they are mostly made of keratin, a protein also found in hair and the outer layer of the skin. They grow from the base of the finger and help protect the fingertips from injury. They also make it easier to scratch, pick up small objects, and handle things with care.

The condition of your fingernails can also tell you something about your health. Changes in color, shape, or texture can sometimes be a sign that something is wrong, although they do not always mean there is a serious problem.

Beyond their practical use, fingernails are also part of grooming and style. People may cut them, clean them, paint them, or decorate them. In many places, taking care of them is a normal part of personal appearance.

Figuratively, the word can also appear in expressions about very small margins or difficult situations. For example, if someone wins "by a fingernail," they win by only a tiny amount. If someone is "hanging on by their fingernails," they are barely managing to continue. So the word can describe both the hard part at the end of a finger and a narrow, struggling situation.