Revulsion Jinx

"[...] I forced him to let go with a Revulsion Jinx [...]"

- Hermione explaining her use of the spell on Yaxley

The Revulsion Jinx (Relashio) is a spell that forces an object or person to release its hold on something, or repels objects with the force of another object.

Effect
Releases a jet of fiery purple sparks at the target. Underwater, this spell fires a jet of boiling water at whatever the caster is pointing his or her wand at.

Known uses
"Pointing his wand at the thick cuffs chaining the best to the floor, he yelled, "Relashio!""

- Harry casting his spell, freeing Gringotts dragon

Possible uses

 * Mundungus Fletcher may have used this spell in 1996 outside the Three Broomsticks, when Harry, angered by Mundungus's plundering of Sirius Black's possessions, grabbed the former by the throat.
 * Remus Lupin may have used this spell against Harry Potter in 1997 after Harry accused him of cowardice for deciding to abandon his family.
 * Given its effects, it is possible that Relashio may also be able to act as a counter-spell for incarceration spells, Incarcerous and Incarcifors. Relashio may release a victim from the binding ropes conjured via Incarcerous, while it may also free a victim from the prison transfigured from other items using Incarcifors.

Known practitioners

 * Bob Ogden
 * Hermione Granger
 * Ron Weasley
 * Harry Potter

Behind the scenes

 * In, Harry Potter used it underwater against the Grindylows during the Second Task of the Triwizard Tournament. The spell produced a flash along with a jet of boiling water in this setting.
 * In, Dolores Umbridge is seen using a spell to force a kissing couple away from each other. The spell used may have been a non-verbal form of the Revulsion Jinx.
 * In the film version, it was Hermione Granger who used this jinx to free the dragon guarding the high-security vaults in Gringotts Banks during the 1998 Break-in of Gringotts Wizarding Bank.
 * It is possible that Relashio may be related to Emancipare and Liberare, which are also etymologically derived from Latin for "set free". It is however hypothetical in the case of Emancipare, not only due to its conjectural nature, but that it is also similar to The Disarming Charm. It forces the target to drop what the target is holding. Relashio releases a targets grip, thus may disarm them.

Etymology
Probably from the French verb relâcher meaning "to release, to set free", or Italian rilascio (pronounced the same way as the spell) meaning "I release".

Notes and references
Embrujo de Repugnancia Lashlabask Relashio Релашио pt-br:Azaração Repelente