The term 'STONY-faced (expressionless)' is a phrase used to describe someone who has an emotionless facial expression. It is often used to describe someone who is not showing any emotion or feeling, and can be seen as a sign of indifference or apathy. The term can also be used to describe someone who is trying to hide their emotions. The crossword solution for this term is 'STONY', which is a five letter word.