sack·cloth
noun/ˈsækklɒθ/
/ˈsækklɔːθ/
(also sacking)
[uncountable]Idioms - a type of rough cloth made from jute, etc., used for making sacks
粗麻布；麻袋布
Idioms
wear, put on, etc. sackcloth and ashes
- to behave in a way that shows that you are sorry for something that you have done
忏悔；悔恨；后悔