Completely

a completely different ball game

By that logic/rationale you would have to completely cut off the Internet just because a few sickos use it to swap child porn

completely rounded

He left me completely in the dark about his plans

He was completely baffled

He was completely lacking in courage

Her husband has her completely under his thumb

His life is completely taken up by work

I reject that completely!

I was completely browned off

It’s a completely different ball game

Then everything got completely out of hand/out of control

They completely overdo it on TV

to be completely cracked

to be completely surprised