A large, round stone used for grinding grain into flour.

A burden or hindrance that is difficult to remove.

एक बोझ या बाधा जो हटाना कठिन हो।

English Usage: His debt became a millstone around his neck.

Hindi Usage: उसका कर्ज उसके लिए एक मोटे बोझ की तरह बन गया।