Delete all occurence of a word in one shot

Shell Programming and Scripting
1

i have a file called file1

cat file1
i am namish
namish lives in India
India and namish both are good.

I want to delete all the occurences of namish in one shot,if i do it with sed i guess all the lines will be deleted containing the pattern.Suggest me any idea without AWK.

Thanks
Namish

2 
sed 's/namish//g' file1
3

Thanks for the reply.

If i do not want the space at the place of the deleted pattern,what is suggested.

4 
sed 's/ *namish *//g' file1

or

sed 's/^namish //g; s/ namish$//g; s/ namish / /g' file1
5

Thanks robotronic!

6

use vi editor and replace all occurances of namish with " "

7

and what if there are 1000 occurances of namish in it? Then in command mode:

:1,$s/namish//g