Industry is an 'integral' [='essential'] part of modern society.
His character is 'integral' [='essential'] 'to' the story.
She had become an 'integral' part of their lives.
(..) I also need help finding this girl named Rita, like, immediately... - and Frito will give you a hand with it. - Why? Well, because, uh, you know, she'd be an essential... integral... asset... Utilize her! Utilize her! Hey, uh, but you're gonna bring her here, right? Oh, yeah. Butt first! (..)2006 Idiocracy