Sīla is often translated as virtue.
A virtue is a trait, quality, that is deemed morally good. Now would you consider right concentration to be a virtue? Or right effort? And what about right view? I do, yet those are not sīla.
And what to think of bad virtue... A bad quality which is deemed morally good? This is rather strange right? Yet sīla can be good or bad.
Our speech, doing and way of life are sīla. To me sīla means conduct.
Sīla (nt.) conduct.