The door freezes and shatters
The message "The door freezes and shatters" is given when zapping a bolt of cold at a door.
If you cannot see the door, the message is instead "You feel cold".
The following information pertains to an upcoming version (NetHack 3.7.0). If this version is now released, please verify that it is still accurate, then update the page to incorporate this information.This message is changed to "You hear a deep cracking sound", and no message is printed at all if you can't see the door and are Deaf.