Lirpa
From Memory Alpha, the free Star Trek reference
The lirpa is a traditional Vulcan melee weapon, consisting of a metal staff with a fan-shaped blade on one end and a club on the other. The half below the shaped blade has some Vulcan letters on it.
In 2154, the Vulcan commandos sent by the Vulcan High Command after Jonathan Archer and T'Pol wielded lirpas, since energy weapons were useless in Vulcan's Forge. Archer disarmed one of them and was very familiar with the use of this weapon because of his mind meld with Syrran. (ENT: "Kir'Shara")
It is used by combatants in the Kal-if-fee, the traditional mating challenge during the Pon farr. (TOS: "Amok Time")
