IPA: /ˈɡʌsɪt/
KK: /ˈgəsət/
A triangular piece of material added to a seam in clothing or other items to provide extra strength or allow for expansion.
The dress had a gusset under the arms to give her more room to move.
Gusset → The word 'gusset' originates from Old French 'gousset', meaning a small piece or patch of material. It refers to a triangular or diamond-shaped piece of fabric inserted into a garment to provide extra room or reinforcement.
Think of a 'small piece' ('gousset') of fabric that adds extra space or support in clothing — that's what a gusset does.