unkeyword

UNKEYWORD  -  remove keywords from the current message

Usage:  UNKEYWORD keyword-name

The UNKEYWORD command removes a keyword from the message.  When the 
  message has no more KEYWORDS associated with it, the K indicator in the
  headers and the "keywords" header field in the message are removed.

To find out what keywords have been defined, type "keyword ?".  If a
  message has any keywords, you will see them in a header field,
  "Keywords", when you read the message.

Example:
    Read>unkeyword bird 	#removes keyword "bird" from the message

For more help type "help" and one of these topics:
  keyword   set keywords   headers   message-tagging