Spoiler warning: Plot and/or ending details follow.
A cudgel (or club) is a simple weapon that is basically a simple piece of wood or other hard material. To many races and cultures, including Humans, the cudgel is one of the first mêlée weapons ever invented.
The Tellarite Tevrin Krit owned a cudgel that was sacred to his family and had been passed down through generations. The cudgel was stolen by Harry Mudd after sleeping with Krit's sister. Mudd still had it in his possession and was looking for a buyer while he was perpetrating a con using android duplicates of himself. (Short Treks episode: "The Escape Artist")
In 2267, after contracting a virus on Gamma Hydra IV which caused rapid aging, James T. Kirk stated during a competency hearing that the inquiry was not a proper procedure, but rather a cudgel. (TOS novelization: The Deadly Years)In 2267, the back end of a lirpa was described as a metal cudgel. Kirk was clubbed by that end while fighting Spock on Vulcan. (TOS novelization: Amok Time) In 2269, Spock re-experienced that battle, including using the cudgel end of the lirpa, during a two-hour-long psychic projection experience created by Irapina on the planet Anomaly. (TOS novel: Planet of Judgment)
In 2291, during a mutiny on the K'tanco led by Klaa, Captain Kang was attacked by a mutineer and hit in the chest by a cudgel. Spock prevented a second blow which would have killed the captain. (TOS - Mere Anarchy eBook: The Blood-Dimmed Tide)
In 2328, following Tima’s death, Oralian Way cleric Bennek and his people were attacked by Bajorans armed with cudgels and stun weapons, led by Vedek Arin, who thought that Bennek’s people had burned their places of worship. (TLE - Terok Nor novel: Day of the Vipers)
- TOS novelization: Amok Time
- TOS novel: Planet of Judgment
- TLE - Terok Nor novel: Day of the Vipers
- TNG novel: To Storm Heaven
- NF novel: The Quiet Place
- NF novel: Renaissance
- TOS - Mere Anarchy eBook: The Blood-Dimmed Tide
- TOS comic: "The Cosmic Cavemen"