fall down

US /fɔːl daʊn/
UK /fɔːl daʊn/
"fall down" picture
1.

cair, desabar

to drop to the ground, typically accidentally

:
Be careful not to fall down the stairs.
Cuidado para não cair da escada.
The old building started to fall down after the earthquake.
O prédio antigo começou a cair depois do terremoto.