groupdel —
remove a group from the system
The groupdel utility removes a group from the system.
  See group(8) for more information
  about EXTENSIONS. The options are as follows:
  - -v
- Enable verbose mode - explain the commands as they are executed. This
      option is included if built with EXTENSIONS.
Thegroupdel utility exits 0 on success,
  and >0 if an error occurs.
The groupdel utility first appeared in
  NetBSD 1.5. It is based on the
  addnerd package by the same author.
The groupdel utility was written by
  Alistair G. Crooks ⟨agc@NetBSD.org⟩.