noun / verb
chunk
CHUHNK/tʃʌŋk/
A substantial piece or distinct unit of a larger whole.
The chunk of chocolate matches the broken corner of the larger block.

Etymology
Probably a variant of chuck, “piece,” especially a short, thick piece. Its precise formation is uncertain.
In context
in Rome, I've seen nonnas boil - you know when your water's coming up to the boil when you're about to cook your pasta - they'll put just one little chunk like that of potato
More examples
- A large chunk of plaster fell from the ceiling.
- The lesson chunks information into manageable units.
- We spent a substantial chunk of the budget on repairs.
Forms
chunk · chunks · chunked · chunking
chunky adjective — made of substantial pieces