1. most likely to break apart into small pieces; most fragile or brittle
Usage: superlative form of crumbly

Examples

• This is the crumbliest cheese I’ve ever tried to slice.
• The crumbliest part of the old wall collapsed first.
• She chose the crumbliest cookies from the batch.
• The crumbliest soil in the garden needs more organic matter.
• That’s the crumbliest pie crust I’ve ever made.
• The crumbliest rocks were easily broken by hand.