put one's foot down 坚持立场；拿定主张；果断行动

【例句】
When those who kill him who pursued, he put his foot down to hide, he is tough fight.
当那些要置他于死地的人穷追不舍时，他毅然决然地选择躲避，他要的就是韧的战斗。

She put her foot down and left home with the baby.
她固执己见, 带着孩子便离家了。