inexpressive (adjective)

1. The inexpressive knight sat silently on his horse, staring into the distance with a stoic expression.

2. The cartoon character's inexpressive face made it difficult to discern his emotions.

3. During the Great Depression, many people wore inexpressive masks to hide their despair and struggles.

4. The minimalistic living room design featured clean lines and inexpressive colors, creating a calm and serene atmosphere.