под ней

under it, below her

→ под
phrase Rare #32,127
under it, below her Used with a feminine singular noun or pronoun in the instrumental case. Can mean physically underneath or in a lower position, like a lower apartment.
RU: Ключи лежали под ней.
EN: The keys were under it.

Однажды в школе под ней сломался стул.

One day at school the chair broke under her.

— Токийская повесть (1953)

Ну валялся бы тогда уже сам под ней.

Well, then I would be lying under it myself.

— Левиафан (2014)

Он живёт в квартире под ней.

He lives in the apartment below her.

Корабль не смог под ней пройти.

The ship could not pass under it.