Wearing a bonnet; decorated with or having a bonnet attached to something.
From 'bonnet' plus the adjectival suffix '-ed', creating a descriptive form meaning 'having or wearing a bonnet,' used from at least the 18th century.
In old literature, a 'bonneted woman' conjures up a specific Victorian image, but the word also appears in descriptions of furniture and architecture—bonneted chimneys, for example, which have protective cap-like structures!
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