Usage examples for expressionless:

• Helena could not bear to see him look so vacant and expressionless "The Trespasser" – D.H. Lawrence

• He did not say anything, neither did the others; it was a time for thinking rather than talking; but he looked, and as Lennard watched his almost expressionless face and the angrily- glittering blue eyes, he felt that it would go ill with an enemy whom K. of K. should have at his mercy that day. "The World Peril of 1910" – George Griffith

• They seemed dull and expressionless like the eyes of a new baby, but he was back for the world again. "Joe Wilson and His Mates" – Henry Lawson

• Janina glanced at him and said in a quiet, expressionless voice: " Take me home, for I feel so very miserable." "The Comedienne" – Wladyslaw Reymont