Its Onion.
As cut onion with knife and while cutting person will cry
it is onion.
Onion. We use the knife to cut the Onion's head and we cry (weep) when its cut (dead)
Answer: ONION we use a knife to slice it's head and weep beside it when I am dead.
I am covered with milky soft coat &
When my head glows red,
I slowly sink into a white bed,
Never to stand again.
Who Am I?
Once you are in my sight, you are gone in a flash, and people tend to use me for cash. I am often used as a dire assist, and people often believe that I cause harm, when I am but its catalyst. What am I?