Inscribable
From Guild Wars Wiki
Inscribability or an Incription slot is an inherent property of some weapons which allows them to accept inscriptions. The system was introduced with Guild Wars Nightfall; inscribable weapons are only available in Nightfall, Guild Wars Eye of the North, in the chests that spawn after defeating Kanaxai and Urgoz, and in the Hall of Heroes chest.
The introduction of inscribable versions of a weapon lead to confusion, as it is not immediately obvious whether a weapon has an inscription slot or not. The text "Inscription: None" or "Inscription: <Inscription name>" in the weapon description reveals that an item is inscribable. If the description does not contain this text, the weapon cannot be inscribed.

