Franklinian virtue
silence
http://id.loc.gov/authorities/subjects/sh85122464
https://en.wikipedia.org/wiki/Category:Silence
https://en.wikipedia.org/wiki/Silence
BJ1499.S5
The absence of ambient audible sound, the emission of sounds of such low intensity that they do not draw attention to themselves, or the state of having ceased to produce sounds; this latter sense can be extended to apply to the cessation or absence of any form of communication, whether through speech or other medium.
silent
The A – Z of Gender and Sexuality: From Ace to Ze