mutism

The most constant feature was her mutism, but even that was a few times interrupted.

Her mutism and refusal of food she was unable to account for.

Later, this was followed by mutism, refusal to eat, and stupor.

Mutism, as used in psychiatry, is an abnormal inhibition to speech.

From the description this again seems to have been a typical stupor (immobility, mutism, tendency to catalepsy, rigidity).

It is not unlike the ordinary stupor in the fact that there was intense inactivity and mutism with great tenseness.

During the night she is reported to have varied between stiffness with mutism and a more relaxed state.

When deafness is associated with mutism, he thinks it is often due merely to the inattention of the stuporous state.

Dumb walls merely, their mutism leaves large scope to imagination, and one may conjecture any but the right thing.

Cousin Primitivo himself, with all the wisdom of the ancients, could not draw him out of his mutism.