inexpressive

The characters’ inexpressive faces are closer to Noh theater than to the Globe.

Captain Holt's often inexpressive face concealed a character of depth and warmth who viewers came to adore.

Some responses described autistic people as “shut down from the outside world” or “completely inexpressive and apparently without emotions,” according to the November 2022 Frontiers in Psychology study.

In many societies, boys and men are expected to be strong, active, aggressive, tough, daring, heterosexual, emotionally inexpressive and dominant.

The second consequence is a quality-of-life issue for emotionally inexpressive men and anyone who has to deal with them, as illustrated by this actual exchange between co-workers.