silentiary
noun
si·len·ti·ary
sīˈlenchēˌerē
plural -es
1
: an advocate of silence especially as a religious observance
2
: one of various court officials of the later Roman Empire sworn not to divulge secrets of state
3
: one appointed to keep silence and order (as in a court of law or a public assembly)
Word History
Etymology
Latin silentiarius slave charged with maintaining silence among the domestic staff, from silentium silence + -arius -ary