To make or keep secret.
To hide secretly.
Being or kept hidden.
Private seclusion.
A piece of knowledge that is hidden and intended to be kept hidden.
The key or principle by which something is made clear; the knack.
A form of steel skullcap.
Something not understood or known.
Any prayer spoken inaudibly and not aloud; especially, one of the prayers in the Tridentine Mass, immediately following the "orate, fratres", said inaudibly by the celebrant.
The bodily process of breathing; the inhalation of air to provide oxygen, and the exhalation of spent air to remove carbon dioxide.
An exchange of views during a discussion.
The mechanical system used to assist breathing.
The replacement of stale or noxious air with fresh.
The public exposure of an issue or topic.
The mechanical system used to circulate and replace air.