gusset
gus-set
noun
A piece of material sewn into a garment to provide extra width or strength.
"The gusset in the shirt allowed more movement."
Thesaurus
Synonyms: inset, voider, gusset plate
gus-set
A piece of material sewn into a garment to provide extra width or strength.
"The gusset in the shirt allowed more movement."
Synonyms: inset, voider, gusset plate