petticoat
noun
[ ˈpɛtɪkəʊt ]
• a woman's light, loose undergarment hanging from the shoulders or the waist, worn under a skirt or dress.
Origin:
late Middle English: from petty coat, literally ‘small coat’: the word originally referred to a garment worn by men under a coat or doublet. The second sense derives from a later use to mean ‘skirt’.