Every so often there's an outbreak of korektitis - you know the argument over whether korekta can mean correct or whether it can only mean corrective or correctional.

Such an outbreak occurred recently in a thread in the Esperanto forum.

Underlying this malsano is the idea that Korekt is a verbal root and roots must have a fixed grammatical class.

It occurred to me this morning that fans of the grammatical class theory might still be able to rescue the theory by declaring Korekt not to be a verb or an adjective or a noun but to belong to another class.

Maybe the derivations would all seem regular if korekt were declared to be adverbial, or even to belong to a fifth class.