Examples from the Web for undergarment
But Shrier noted that undergarment trends tend to “ebb and flow.”Kate Middleton’s “Bottomgate” Shows Why Women Still Need Slips|Keli Goff|May 28, 2014|DAILY BEAST
Undergarment, un′dėr-gr-ment, n. any article of clothing worn under another.
Over her shoulders were the thin strings of an undergarment that Tom thought was generally concealed.Tutors' Lane|Wilmarth Lewis
Should the apron and cap not be needed for the cooking class, an undergarment (corset cover) may well be substituted.Ontario Teachers' Manuals: Household Science in Rural Schools|Ministry of Education Ontario