Repello Inimicum

"Protego Maxima. Fianto Duri. Repello Inimicum."

- Filius Flitwick conjures up magical defences prior to the Battle of Hogwarts.

Repello Inimicum is a charm that, when cast in combination with Protego Maxima and Fianto Duri, conjures up an almost impregnable magical protection barrier. Bodies crossing the boundaries of the barrier disintegrate on the spot, while spells cast at it (if not of enough power to break it) create large, resonating explosions. This spell's effect is most likely seen when the charging snatchers run at the shield, and disintegrate in seconds.

Known uses
This spell was cast by Charms Master Filius Flitwick to protect the boundaries of Hogwarts Castle from the Death Eater forces in the late hours of 1 May, 1998, prior to the Battle of Hogwarts that started at midnight the next day. The Death Eaters, on Voldemort's command, started bombarding the magical protection with spells, and they were ultimately brought down by a spell cast by Voldemort.

Etymology

 * The incantation is derived from the Latin "Repello", meaning "I drive away" and "inimicum", the accusative singular form of "inimīcus" meaning "foe" or "enemy". Altogether the incantation means "I push back the enemy".

Behind the scenes

 * Vlcsnap-2011-12-01-00h41m00s131.png concrete effect of this spell is unknown, though given its etymology it appears it was devised to repel enemies. And, in Harry Potter and the Deathly Hallows Part 2, Dementors dodged the spell, but the only spell that repels Dementors is the Patronus Charm.
 * RepeloInimigotumhs.pngRepelloInimigotummw.png Harry Potter and the Deathly Hallows, the protective enchantments around the grounds were summoned by Filius Flitwick, and Flitwick alone. In the second part of the film adaptation, Flitwick is joined by [[Molly Weasley]], [[Horace Slughorn]] and two unknown teachers or members of the Order of the Phoenix to do so.
 * This spell replaces the spell Cave Inimicum which is only seen in the book Harry Potter and the Deathly Hallows.
 * The spell, in the Bonus Features includes the making of the Shield. It distinctly sounds more like Cave Inimicum than Repello Inimicum.

Appearances

 * Harry Potter and the Deathly Hallows
 * Harry Potter and the Deathly Hallows: Part 2