Petticoat comes from Middle English pety cote, combining Middle English pety from Middle French petit, ultimately from Frankish kotta, a garment term of uncertain origin.
petticoat (English): A tight, usually padded undercoat worn by men...
Definitions
A tight, usually padded undercoat worn by men...
Ancestry of “petticoat”, step by step
petticoat traces back through two separate lines of ancestry.