Using sed to delete a case insensitive matched line

How do I match a case insensitive regex and delete it at the same time I read that to get case insensitive matches, use the flag "i" ``` sed -e "/pattern/replace/i" filepath ``` and to delete use d ``` sed -e "/pattern/d" filepath ``` I've also read that I could combine multiple flags like 2iw I'd like to know if sed could combine both i and d I've tried the following but it didn't work ``` sed -e "/pattern/replace/id" filepath > newfilepath ```