DictionarygussetFabric insert
noun

gusset

GUS-it/ˈɡʌsɪt/

A strengthening insert fitted between joined sections.

A gusset reinforces the seam where the sleeve meets the jacket.

A close view of a shirt laid open with its sleeve extended, exposing a contrasting diamond-shaped fabric gusset sewn into the underarm junction.
Etymology

Old French gosset named an armhole or a piece of armor protecting the armpit. The term moved from armor to clothing, where it names an inserted fabric piece that strengthens or expands a garment.

In context

Niler Taylor0:37
So this is where we're going to want to add the gusset piece or the piece to add us more fabric.
How To Insert A Gusset In A Garment That's Too Tight! - Viewer Request

More examples

  • The pants have a gusset that allows more room for movement.
  • Steel gussets strengthen the joints between the roof beams.
  • She sews a gusset into the bag to reinforce its bottom.

Forms

gusset · gussets

Similar words

reinforcement
Any added strengthening material, not necessarily an insert at a joint.
brace
A structural support, often a bar rather than an inserted plate.