underpinning 

Foundation of ones ideas

She told him why she is not interested in him underpinning it with her religious beliefs.

underpinning by Otolorin November 9, 2018

undermining 

The act of under estimating something about someone or the act of making a person feel inferior to ur to your list of skills

You are undermining my knowledge bro

undermining by La SAPE August 18, 2019

underpointing 

invented in Rye, England

The act of pointing at a person via an underarm swing. Widely percieved as the gayest form of pointing known to mankind.

Gary walked into the bar and saw Jamie. Excited at the the prospect of friends at the bar, Gary pointed in a manly fashion. Jamie leapt to his feet and began the act of underpointing. Gary left the bar.

underpointing by andychilly April 17, 2009