crum·bly /-b(ə)li/ (a.)易碎的,脆的
Crum·bly a. Easily crumbled; friable; brittle. “The crumbly soil.” Syn: -- crimp. ◄ ►
crumbly adj : apt to break into small fragments or disintegrate; "crumbly cookies" [also: crumbliest, crumblier]