What is "connegative"

n. A verb form used with a negative verb in certain languages.

The connegative is a word form used in negative clauses. In the grammar of French, it refers to an obligatory negation marker such as pas in Je ne sais pas "I don't know". In the grammar of Finnish, it refers to a verb form consisting of an endingless stem (one of five infinitives of Finnish) used with a negative verb (used as an auxiliary verb), as for example tiedä in en tiedä "I don't know".