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'.
(..) -Costly. Well, our oil sits right up on top of the ground. I believe that's called seepage. Doesn't necessarily mean there's anything underneath. -What would you give us for it? -I don't know. -Something you don't know. -That's right. What would you like, Eli? (..)2007 There Will Be Blood