Underwear
Words for the bottom half of female lingerie: pants (US) versus knickers, drawers, or panties, but never pants! (UK). 'Briefs' is another possibility. 'French knickers' = knickers with frills, looser-fitting. Note the French cache-sex as a prototype 'G-string. Other types of undergarments are spandex shorts common for women who exercise. These shorts are used because it supports the behind and the back for good posture.