expressionless

/ɪkˈsprɛʃənləs/
adjective
  1. Showing no emotion, feeling, or reaction on the face or in the voice.
    • The guard stood with an expressionless face, not reacting to the crowd.
    • Her voice was completely expressionless as she read the boring announcement.
    • He tried to stay expressionless during the surprise party, but he couldn't hide his smile.
Antonyms
What does "expressionless" mean? | whatsthatwordmean | whatsthatwordmean