millstone
[noun]
Synonyms:
- grindstone, quernstone
- burden, affliction, albatross, encumbrance, load, weight

[TahlilGaran] English Synonym Dictionary ▲

mill‧stone /ˈmɪlstəʊn $ -stoʊn/ noun [countable]

1. one of the two large circular stones that crush grain into flour in a mill

2. a millstone round/around sb’s neck something that causes a lot of problems for someone, and that they cannot get rid of:
Inflation is still a millstone round the neck of British businesses.

[TahlilGaran] Dictionary of Contemporary English ▲