millstone
noun[C]
uk/ˈmɪl.stəʊn/us/ˈmɪl.stoʊn/one of apairoflarge,circular,flatstonesused,especiallyin the past, tocrushgrainto makeflour
磨石,磨盘![picture of millstone picture of millstone](https://dictionary.cambridge.org//images/thumb/millst_noun_002_23362.jpg?version=5.0.287)
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Tools
- -pronged
- adjustable spanner
- adze
- Allen key
- auger
- awl
- excavator
- gimlet
- gouge
- grapnel
- grappling iron
- grindstone
- guillotine
- plunger
- rasp
- razor knife
- reamer
- sander
- sandpaper
- trowel
Idiom
be (like) a millstone aroundyourneck