Atrial
Part of speech: adjective
Definition: Of or pertaining to an atrium, especially the atrium of the heart.
Chamber
Part of speech: verb
Definition: To enclose in a room.To place in a chamber, as a round of ammunition.To create or modify a gun to be a specific caliber.In martial arts, to prepare an offensive, defensive, or counteroffensive action by drawing a limb or weapon to a position where it may be charged with kinetic energy.
Part of speech: noun
Definition: A room, especially one used primarily for sleeping; bedroom, sleeping room.An enclosed space. For example, a test chamber is typically a closable case where devices under test are placed.In a firearm, this is the portion of the weapon that holds the ammunition round immediately prior to (and during initiation of) its discharge.One of the legislative bodies in a government where multiple such bodies exist, or a single such body in comparison to others.
Example sentence: As an author, you're really grateful for the people who are supporting you, but on some other level, that can be a dangerous echo chamber.