gusset

名词 gusset:

1. a piece of chain mail covering a place unprotected by armor plate
   同义词：voider
2. a metal plate used to strengthen a joist
   同义词：gusset plate
3. a piece of material used to strengthen or enlarge a garment
   同义词：inset

gus.set

n.（名词）
A triangular insert, as in the seam of a garment, for added strength or expansion.
衬料：一种三角形的插入物，在衣服的缝合处，为加固或加大衣服而用
A triangular metal bracket used to strengthen a joist.
角撑板：一种三角形的金属托架，用来加固地板托梁
A piece of mail or plate armor protecting the joints in a suit of armor.
护腋甲片：盔甲中用来保护连结处的铠甲或薄盔

来源：
Middle English
中古英语
from Old French gousset [perhaps diminutive of] gousse [pod, husk]
源自 古法语 gousset [] 可能是gousse的小后缀 [壳，支架]