bonnet
noun
[ ˈbɒnɪt ]
• a woman's or child's hat tied under the chin and with a brim framing the face.
• the hinged metal canopy covering the engine of a motor vehicle.
• a cowl on a chimney.
• an additional canvas laced to the foot of a sail to catch more wind.
Origin:
late Middle English (denoting a soft brimless hat for men): from Old French bonet, from medieval Latin abonnis ‘headgear’. bonnet (sense 1) dates from the late 15th century.
