She underacts in emotional scenes to avoid melodrama.

She underacted the role of the grieving mother, choosing subtle gestures over overt displays of sorrow.

By underacting the role, he made the antagonist seem less threatening.

Her underactive thyroid made her feel constantly tired and sluggish.

The committee documented several underactions that contributed to the project's failure.

Her underaction as deputy involved coordinating follow-up meetings and handling supportive paperwork.

The patient's underactivity contributed to the delayed progress in rehabilitation.

In the audition, she chose to underact, letting subtle gestures speak for the character rather than grand theatrics.