Shout
From LSWiki
Command: Shout
General-Use Command Usage: shout <message> [at <person> [and <person>...]] [in <language>]
Use this command to shout a verbal message at high volume. It will generally be audible several rooms away.
Development Information: The shout command was created by Chaos; the source code was last updated Wed Feb 14 07:47:41 2007.