I. dəˈsü noun
( plural dessous -ü(z))
Etymology: French, from dessous, adverb & preposition, underneath, below, from Old French desoz, from de- + soz below, underneath, from Latin subtus, from sub under — more at sub-
: underwear
II. adjective
Etymology: French, adverb, underneath
ballet : under — used of the movement in which the working leg passes behind the supporting leg