adjective
frangible
FRAN-juh-bul/ˈfrændʒəbəl/
Designed or likely to break into pieces under impact or pressure.
The frangible cup breaks into pieces after a light accidental knock.

Etymology
The pieces express being capable of being broken. In the selected sense, frangible describes something that breaks readily into pieces, rather than merely something breakable in principle.
In context
When a frangible bullet strikes a hard target, it shatters into tiny fragments or dust.
More examples
- Excess pressure shatters the frangible disk inside the valve.
- Frangible bullets break apart when they strike a hard surface.
- Foam padding protects the frangible ceramic parts during shipping.
Forms
frangible
frangibility noun — The quality of breaking easily into pieces.