Items can have attributes, like blessed/uncursed/cursed (BUC) status.
“In NetHack, many varieties of items can stack into one inventory slot. This includes: gems...Stackable
“BUC is an acronym meaning blessed/uncursed/cursed. It is usually used in phrases such as "BUC...BUC
“Certain nasty items will autocurse themselves (that is, instantly become cursed), so exercise...Autocursing
“Fixed is a synonym for any form of erosion-proofing, and is generally used as such to refer to...Fixed