noun / verb / adjective
splinter
SPLIN-tur/ˈsplɪntər/
A thin fragment breaking from a larger whole.
A sharp splinter projects from the broken plank beside smaller chips.

Etymology
Middle Dutch splinter already named this kind of fragment. The early English sense emphasized a sharp-edged sliver broken lengthwise, especially from wood—the same characteristic shape central to the current meaning.
In context
pulled out like an inch of bamboo fiber, a splinter that I apparently swallowed that just lodged in the back of my throat.
More examples
- The dry boards splinter when we pry them loose.
- The coalition splintered into rival factions after the election.
- A splinter group leaves the party to form its own organization.
Forms
splinter · splinters · splintered · splintering