fine split; splinter; rough edge
Refers to a small, thin piece of wood, skin, or other material that has peeled or split, often with a rough edge. Commonly used for wood splinters or the frayed skin around nails.
A splinter from the wood got stuck in my finger.
hangnail; agnail
Specifically the small, torn piece of skin near a fingernail or toenail. In everyday Japanese, ささくれ is the standard word for a hangnail.
When it's dry, I tend to get hangnails on my fingers.
The word is likely derived from the verb ささくれる (to split finely, to become frayed). The exact historical derivation is uncertain, but it is a native Japanese word.