From Elendor
whisper <player>=<message>
whisper/silent <player>=<message>
whisper/noisy <player>=<message>
whisper/noeval <player>=<message>
whisper/list <players>=<message>
Whispers the message to the named person, if they are in the same
room as you. No one will see the message you whisper. You can also
whisper to things you are carrying, or to things that are carrying
you. whisper <player>=:<pose> also works, in a fashion similar to
page-pose.
In a noisy whisper, other players in the room may be told who you whispered
to (but not what you whispered): Polgara whispers to Javelin. On Elendor,
noisy whispers are disabled. Use +whisper.
In a silent whisper, other players will not know that you whispered.
The default whisper is silent.
The /noeval switch prevents any evaluation of the message, and
is handy when you want to say things that use special characters
like % or []'s.
The /list switch lets you whisper to many people at once. Multiple
persons should be space-separated, and names with spaces should be
enclosed in double-quotes.
'whisper' can be abbreviated by just 'w'.