Under-skirts are a part of clothing worn underneath a skirt to provide added coverage, warmth or structure. Some common synonyms for under-skirts include petticoats, underskirts, half-slips, and full-slips. A petticoat is a flared underskirt made of lightweight material like cotton or taffeta, commonly worn during the 16th century. An underskirt, on the other hand, refers to a plain or simple skirt-like garment worn under a long skirt or dress. Half-slips are waist-length undergarments worn under a skirt, while full-slips provide more coverage and extend from the waist to the ankle. Synonyms for under-skirts are useful for describing the type of undergarment needed for a specific outfit or occasion.