Able to be crunched; something that produces a crunching sound or sensation when bitten or pressed.
From 'crunch' (onomatopoetic verb) plus the adjective-forming suffix '-able,' which means 'capable of being' or 'suitable for being'; both crunch and -able have Germanic roots.
The '-able' suffix is so productive in English that we can attach it to almost any verb to create an adjective—'crunchable' wasn't in the dictionary 50 years ago, but any English speaker understands it instantly.
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