(a.) Capable of being split, cleft, or divided in the direction of the grain, like wood, or along natural planes of cleavage, like crystals.

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