break down
US /breɪk daʊn/
UK /breɪk daʊn/

1.
quebrar, parar de funcionar
to stop working (for a machine or vehicle)
:
•
My car broke down on the way to work.
Meu carro quebrou a caminho do trabalho.
•
The washing machine broke down, so I have to wash clothes by hand.
A máquina de lavar quebrou, então tenho que lavar a roupa à mão.
2.
desabar, cair em prantos
to lose control of one's emotions and start crying
:
•
She broke down in tears when she heard the news.
Ela desabou em lágrimas quando ouviu a notícia.
•
He tried to stay strong, but eventually, he broke down.
Ele tentou se manter forte, mas eventualmente desabou.