He might seem unkind, but 'underneath it all' [='actually'], he's a very caring person.
They actually had a lot in common 'underneath' their obvious differences.
She lifted up the rock and found ants crawling 'underneath'.
(..) Of course it is! I've been feeling very gloomy all day! Not my usual cheery self at all! Yeah. I guess it's just difficult to tell underneath all that make-up. I'm not wearing make-up! Could you have a word? They're driving me out of my tiny little mind. Guys! You gonna have to... (..)2006 TvShow: The IT Crowd Title: Aunt Irma Visits Season: 1 Episode 6