ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ ̷ ̷ noun
Etymology: under (III) + body
1.
a. obsolete : the lower part of a woman's dress
b. dialect : a garment (as a petticoat, corset cover, slip) worn under an outer garment
2.
a. : the lower part of an animal's body : underpants
b. : the underwater part of a ship's hull
c. : the lower parts of the body of a vehicle or airplane ; especially : the undersurfaces of an automotive vehicle