Sihil

A Sihil is a dwarven sword made with use of advanced metallurgy and swordmaking technology.

In the Witcher novels, Zoltan and Percival Schuttenbach were quite passionate in their descriptions of why sihils, and indeed all dwarven blades, were superior to elven or human weapons.

In Baptism of Fire, Zoltan gives Geralt his own sihil, which is used by the witcher until the Rivian Pogrom. It was inscribed with Confusion to the whores' sons! sentence written in ancient dwarven runes.

In The Witcher and The Witcher 2: Assassins of Kings
A Mahakaman rune sihil named G'valchir is earned as a reward for a quest in The Witcher computer game. It can be imported into The Witcher 2 as Mahakaman rune sihil; there are also Mahakaman sihil and short elven sihil available.