Finite Incantatem

From UnknowableWiki

Finite Incantatem is a spell used in order to stop other charms effects that are at work.

Severus Snape uses the spell during a duel between Harry Potter and Draco Malfoy at the Duelling Club's only meeting, canceling out the effects of both the Tickling Charm and the Tarantallegra spell previously cast by the boys (CS11).

Hermione Granger suggests Ron Weasley uses Finite Incantatem in order to cause the magical rain to stop falling in Yaxley's office (DH12).

Finite Incantatem is likely to be the same spell as Finite, due to the similarity of the names and the effects, but this possibility was never confirmed.