IPA: /ˈdʒʌmpər/
KK: /ˈdʒʌmpər/
A loose piece of clothing worn over other clothes, often made of wool or a similar material, typically covering the upper body and arms.
She wore a warm jumper to keep cozy during the winter.
Jumper → The word originates from the Old French 'jumpe' (meaning a type of garment) and is related to the Middle English 'jumper' (meaning a knitted garment). It refers to a knitted or woven garment worn over the upper body.
Think of a 'garment' from Old French that you wear over your upper body — that's what a jumper is.