Water-Making Spell

Aguamenti is a Charm that creates a jet of clear, pure water or a fountain from the caster's wand. It is taught to sixth-year students at Hogwarts School of Witchcraft and Wizardry in Charms class.

Uses

 * Fleur Delacour conjured water nonverbally in the First Task of the Triwizard Tournament.
 * Marietta Edgecombemay also have used a non verbal version of this spell during a DA meeting in 1995
 * Harry Potter used this charm to fill Albus Dumbledore's crystal goblet in the Horcrux Cave, but some enchantment caused it to dry up before entering his mouth.
 * During the Battle of the Astronomy Tower, Rubeus Hagrid and Harry used this spell to stop the fire on Hagrid's hut after Death Eaters had set it on fire.
 * During the Battle of Hogwarts, Harry attempted to douse Vincent Crabbe's Fiendfyre with this charm, but apparently Fiendfyre cannot thus be put out.
 * During the Battle of Hogwarts, Harry attempted to douse Vincent Crabbe's Fiendfyre with this charm, but apparently Fiendfyre cannot thus be put out.

Etymology
Agua means "water" in both Spanish and Portuguese; menti is Latin for "mind".

Behind the scenes

 * This charm may be potentially offensive, as pure water is harmful to cells during osmosis.
 * In the film adaption of Harry Potter and the Order of the Phoenix, Albus Dumbledore used a water spell which may have possibly been Aguamenti, though it was more likely to have been Aqua Eructo.

Appearances

 * Harry Potter and the Goblet of Fire
 * Harry Potter and the Order of the Phoenix
 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Deathly Hallows

Notes and references
Агуаменти