1) Breakable 2) Brittle 1) Breakable 2) Capable of being broken 3) Easily broken 4) French word used in English 
A bullet that is designed to disintegrate into tiny particles upon impact to minimize their penetration for reasons of range safety, to limit environmental impact, or to limit the danger behind the intended target. Examples are the Glaser Safety Slug and the breaching round.[15][16]
easily broken
• (a.) Capable of being broken; brittle; fragile; easily broken.
Fran'gi·ble adjective [ Confer French frangible .] Capable of being broken; brittle; fragile; easily broken. 
[adj] - capable of being broken
adjective capable of being broken; `the museum stored all frangible articles in locked showcases`
easily broken; breakable: Most frangible toys are not suitable for young children.
capable of being broken