crumbling

adj

1. That crumbles; that breaks into small pieces or particles.
2. (figuratively)In a state of decline.

verb

1. (form-of, gerund, participle, present)present participle and gerund of crumble

noun

1. Material that has crumbled away; crumbs.

   “Blank I call it, but it was figured over with the patches that please a painter, repaired breaches, crumblings of plaster, extrusions of brick that had turned pink with time[…]”