- underwear, especially women's underwear.
- the legs.
Examples from the Web for underpinnings
The changes are not happening yet on the surface, but in the important place, in the underpinnings of society.
But a reader will never learn about the underpinnings of these friendships.Vogue Creative Director Grace Coddington’s Memoir Offers Few Revelations|Robin Givhan|November 20, 2012|DAILY BEAST
All of these underpinnings of growth and reputation are too important to be left to federal governments.‘Technik’ and the City: How Urban Centers Like New York and Tokyo Are Becoming Info-States|Ayesha and Parag Khanna|June 20, 2012|DAILY BEAST
The Freudian underpinnings that permeated Suddenly Last Summer are also present here.
His performance style and guitar playing provided the underpinnings for the whole Punk Movement and then some.
The gate of the nameless mausoleum had not been opened for many years, and the wind had heaped the dirt against the underpinnings.The Enemies of Women|Vicente Blasco Ibez
Clank, the presses begin again, and all afternoon I iron gentlemen's underpinnings.Working With the Working Woman|Cornelia Stratton Parker
That ship you talked of is awfully plated up topside, but all her underpinnings are pretty weak.A Fleet in Being|Rudyard Kipling
You will have cut the underpinnings from beneath the American dollar.Damned If You Don't|Gordon Randall Garrett