"Pure evil" refers to someone or something that is completely and profoundly wicked, showing no empathy, goodness, or moral conscience.
Sentences with «pure evil»
In investigating, they bring a creature of pure evil aboard their ship. (oracleoffilm.com)
Can you see pure evil in someone after first meeting them? (nerdlocker.com)
This book was ridiculously simplistic and the characters were one dimensional - the mothers and the father were all just pure evil with no other emotions / motivations whatsoever. (goodreads.com)