mow down

1 - to trim grass or such
I need to make time to mow down the grass

2 - to knock someone/something down
In another case a person moved down medical workers with a car.

گذشته آن mowed down
کشتن ، کله پا کردن، قتل به طرز فجیح و آنی ( مثل زیر گرفتن با ماشین )