㧺
1. 指套。古时缝纫，用皮革作箍套在指上以防针刺。
Finger cots. In ancient sewing, it referred to a leather cover worn on the finger to prevent needle pricks.
《説文•手部》：“㧺，縫指㧺也。”段玉裁注：“縫指㧺者，謂以鍼紩衣之人恐鍼之栔其指，用韋為箍，韜於指以藉之也。”
"In the Shuowen: '㧺 refers to the finger cot used in sewing.' Duan Yucai commented: 'Finger cots are used by seamstresses who fear pricking their fingers with needles, so they use leather to make a cover to protect them.'"
《四分律》卷五十二：“針縫衣患指痛，佛言聽作㧺。彼以寶作㧺，佛言不應爾。”
"In the Four-Part Vinaya, Volume 52: 'When sewing with needles causes pain in the fingers, Buddha advised to use finger cots. They made them from precious materials, and Buddha said that was inappropriate.'"
2. 套子；护套。
Cover; protective sleeve.
《説文•手部》：“㧺，韜也。”段玉裁注：“射韝亦謂之臂㧺。”
"In the Shuowen: '㧺 refers to a cover.' Duan Yucai commented: 'A protective cover for bowstrings is also called an arm cover.'"
王筠句讀：“㧺，要皆套物之物，故通其名。㧺，今謂之套。”
"Wang Yun noted: '㧺 refers generally to any kind of cover, hence the term is widely applicable. It is now referred to as a sleeve.'"
《玉篇•手部》：“㧺，韋韜也。”
"In the Yuyan: '㧺 refers to a leather cover.'"
Summary:
1. An ancient finger cover made from leather, worn to prevent needle pricks.
2. A general term for any kind of sleeve or protective cover.