Spells - E

Engorgio (Engorgement Charm)

Pronunciation: en-GOR-jee-oh (IPA: /ɪn.'gɔ˞.dʒi.əʊ/)

Description: Causes objects to swell in size.
Seen/Mentioned: A "Growth Charm" with the same effect is briefly mentioned. Hagrid is suspected of having performed the charm on his pumpkins in Chamber of Secrets. Then seen in Goblet of Fire when Barty Crouch Jr, impersonating Moody, casts it on a spider to enhance a demonstration of the effects of the Cruciatus Curse, and Ron suggested it might be the cause of Hagrid's abnormal size before learning that he is half-giant. Harry in Deathly Hallows also cast it on a spider.
Suggested Etymology: English word engorge meaning "to fill to excess".

Episkey

Pronunciation: eh-PIS-key (IPA: /ɛpɪ'ski/)

Description: Used to heal relatively minor injuries. When this spell is cast, the person feels their injured body part go very hot and then very cold.
Seen/Mentioned: Used in Goblet of Fire after the first task of the Triwizard Tournament. In Half-Blood Prince, Nymphadora Tonks uses this spell to fix Harry's broken nose; also used by Harry in the same book to fix Demelza Robins' mouth.
Suggested Etymology: Greek episkeu meaning "repair, restoration".[15]
Notes: Rowling writes in Half-Blood Prince that Harry's knowledge tells him this spell could belong to a family (or variety) of Healing Spells.

Erecto

Pronunciation: ee-RECK-toh or eh-RECK-toh (IPA: /ɪ.ˈɹɛk.təʊ/ or /ə.ˈɹɛk.təʊ/)

Description: Used to erect a tent or other structure.
Seen/Mentioned: Possibly used in Goblet of Fire by wizards at the campsites near the Quidditch World Cup. Used by Hermione and Harry to construct shelter for themselves and Ron in Deathly Hallows.
Suggested Etymology: Latin erectus meaning "to set up, to raise"

Evanesco (Vanishing Spell)

Pronunciation: ev-an-ES-koh (IPA: (IPA: /ɛ.vn̩.'ɛs.kəʊ/)
Description: Makes the target vanish.
Seen/Mentioned: Used in Order of the Phoenix by Snape to make Harry's potions disappear from his cauldron. In addition, when Fred and George were showing off their puking pastilles, Lee Jordan cleared the bucket of vomit with the Evanesco spell. During their stay at #12, Grimmauld Place, Bill uses this on a stack of documents. This suggests that Vanished objects can be recovered.
Suggested Etymology: Latin evanesco meaning "to vanish".[13]
Notes: According to Minerva McGonagall, in Deathly Hallows, Vanished objects and organisms go "into non-being, which is to say, everything." This was McGonagall's response to the question, "Where do Vanished objects go?" from the doorknocker at Ravenclaw Tower.

Expecto Patronum (Patronus Charm)

Pronunciation: ex-PEK-toh pa-TROH-num

Description: Conjures an incarnation of the caster's innermost positive feelings, such as joy, hope, or the desire to survive, known as a Patronus. A Patronus is conjured as a protector, and is a weapon rather than a predator of souls: Patronuses shield their conjurors from Dementors, and can even drive them away. A Patronus "cannot feel despair, as real humans can, so Dementors can't hurt it."[16] The conjured Patronus protects the witch or wizard that summoned it, obeys his or her commands, and fades away shortly after it is no longer required. When conjured, a Patronus appears silvery, ethereal, and semi-transparent. Improperly formed Patronuses range from momentary formless bursts of silvery mist, to poorly-defined forms which are easily defeated or quickly dissipate on their own. A full-fledged (or corporeal) Patronus takes on a fixed animal form that is often significant to the witch or wizard casting the charm. Patronuses summoned by a particular person have been known to change, such as Tonks' patronus. Rowling has said that Snape was the only Death Eater to be able to produce a Patronus. According to her this is 'because a Patronus is used against things that the Death Eaters generally generate, or fight alongside. They would not need Patronuses'.[17] According to Fantastic Beasts and Where to Find Them, the Charm is also the only known defensive spell against Lethifolds.
Seen/Mentioned: First seen in Prisoner of Azkaban when a Dementor appears in the Hogwarts Express, and Hermione says that Remus Lupin repelled the Dementor by casting a silvery object from his wand. Harry's corporeal Patronus first appears when Draco Malfoy & his friends dress up as Dementors in an attempt to sabotage Harry, he decides to ask Lupin to teach him how to defend himself against the dementors and takes classes where a boggart takes the form of a dementor. He then uses it again towards the end of the book while trying to repel hundreds of Dementors from Sirius and himself.
Notes: Dumbledore has devised a method of using Patronuses to deliver messages putting it into the exclusive use of the Order of the Phoenix. Members of the Order are the only wizards who know how to use their spirit guardians to send messages to one another. According to Rowling, the Patronus is "an immensely efficient messenger" as it is not hindered by physical obstructions or dark matters. Each Patronus has a special quality and appearance that is different and easy to recognise, which makes it clear which Order member has sent the message. In addition, since no one can conjure another person's Patronus, this method of communication does not carry the risk of passing fake messages.[18] It is noteworthy that in Deathly Hallows, McGonagall creates three Patronuses simultaneously to summon Professors Flitwick, Sprout, and Slughorn.
Suggested Etymology: Expecto Patronum is Latin for "I await a protector".[19] It is related to "pater" (father) and Harry's Patronus indeed takes the same form as that of his father's (a stag).

Expelliarmus (Disarming Charm, Disarming Spell)

Pronunciation: ex-pel-ee-AR-mus (IPA: /ɛks.ˌpɛ.li.'a˞.mɪs/)

Description: This spell is used to disarm another wizard, typically by causing the victim's wand to fly out of reach[20][21]. It can also throw the target backwards when enough power is put into it. As demonstrated in Prisoner of Azkaban, simultaneous use of this spell by multiple witches or wizards on a single person can throw the wizard back with much greater force.
Seen/Mentioned: First seen in Chamber of Secrets, when Snape disarms Gilderoy Lockhart in the Duelling Club; from then on it is commonly used throughout the rest of the series. Draco uses it to disarm Dumbledore and Harry uses the spell to not only disarm Gregory Goyle in the Room of Requirement, but also to reflect Voldemort's killing curse during the final battle. It is seen by the Death Eaters as Harry's signature spell, as he had used it to duel Voldemort in both Goblet of Fire and Deathly Hallows.
Suggested Etymology: Latin expello meaning "to expel, to thrust away" and Latin arma meaning "weapons of war".

Expulso

Pronunciation: ecks-PUL-soh (IPA: /ɛks.ˈpʊl.səʊ/)

Description: A spell which causes objects that it comes in contact with to violently explode.
Seen/Mentioned: Used by a Death Eater in an attempt to capture Harry in Deathly Hallows.
Suggested Etymology: Latin pulso meaning "to strike"