Betraying no emotion is a term used to describe someone who is not showing any signs of feeling or emotion. The term can be broken down into three words: STONY, STOIC, and POKERFACED. STONY is an adjective that means made of stone or having the hardness and coldness of stone. STOIC is an adjective that means indifferent to pleasure or pain; unmoved by joy or grief. POKERFACED is an adjective that means having or showing no emotion or surprise. Together, these three words describe someone who is not showing any emotion.