Sword

A sword is a hand-held, bladed weapon common in pre-industrial humanoid cultures.

Often swords and depictions of swords are used symbolically long after their offensive capabilities are eclipsed by higher-technology weaponry. Klingons wear multi-bladed swords and daggers in everyday dress. (TNG and DS9 various, Star Trek: Operation Beta Shield)

The Starfleet Marine Corps carry a cutlass as part of their standard equipment. (Star Trek: New Order)

Root brought a pair of Japanese swords with him on to the USS Mumbai. They were stored in the ship's armoury.