alienable
breakable
brittle
brittle as glass
cleavable
crackable
crisp
crispy
crumbly
crushable
delicate
dissoluble
dissolvable
divisible
fissile
fissionable
flimsy
fracturable
fragile
frail
frangible
friable
lacerable
scissible
separable
severable
shatterable
shattery
shivery
splintery
vulnerable