backstairs

nouns

a second staircase at the rear of a building
backstairs
domain usage
the form of a word that is used to denote more than one
plural, plural form
is a type of (narrower)
a way of access (upward and downward) consisting of a set of steps
staircase, stairway

adjectives

secret and sly or sordid
"backstairs gossip"; "his low backstairs cunning"- A.L.Guerard; "backstairs intimacies"; "furtive behavior"
backstair, backstairs, furtive