I’m not gonna add all spells, but here are a few common spells Harry has used.
Accio (Summoning Charm)
Pronunciation: Various suggestions have been made, including:
[‘?kkio] (AK-ee-o) – classical Latin (film, video game)
[‘?ksio] (AK-see-o) – (audio book)
[‘æsio] (AH-see-o) – (Scholastic) English
Description: This charm summons an object to the caster, potentially over a significant distance.
Seen/Mentioned: First mentioned in Harry Potter and the Goblet of Fire, when it was briefly used by Molly Weasley on the Weasley twins to confiscate their Weasleys’ Wizard Wheezes’ products from their pockets, before they left for the Quidditch World Cup. Later on in the same book, Harry summons his broom to complete the First Task of the Triwizard Tournament.[GF Ch.20] Near the end of the book, Harry summons a Portkey he can’t reach to escape from the Battle in the Graveyard. Also seen in Half-Blood Prince and Deathly Hallows to try to summon Horcruxes, and Harry even tries to summon a falling Rubeus Hagrid.
Suggested Etymology: The Latin word accio means “I call” or “I summon”.In the Hungarian translation, the spell is called “Invito”, possibly from the word “to invite”.
Diffindo (Severing Charm)
Pronunciation: dif-FIN-doh (IPA: /d?.’f?n.d??/)
Seen/Mentioned: In Goblet of Fire when Harry urgently wants to talk to Cedric he casts this spell to rip his bag, delaying him for class,[GF Ch.9] and in Half-Blood Prince to switch covers of his potion books. Also shown several times in Deathly Hallows, for cutting ropes,[DH Ch.9] chains,[DH Ch.13] etc.
Suggested Etymology: Latin diffindo, “I divide.”
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.” 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’. 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 bogart 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. 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”. 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: /?ks.?p?.li.’a?.m?s/)
Description: This spell is used to disarm another wizard, typically by causing the victim’s wand to fly out of reach. 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”.
Pronunciation: LAN-glock (IPA: [‘le??.l?k])
Description: Glues the subject’s tongue to the roof of their mouth. Created by Snape.
Seen/Mentioned: Used by Harry in Half-Blood Prince on Peeves and on Argus Filch, to general applause.
Suggested Etymology: Latin lingua meaning “a tongue” or “a language” and English lock meaning “to fasten”.
Pronunciation: levi-COR-pus (nonverbal) (IPA: [l?v?.’k??.p?s])
Description: The victim is dangled upside-down by one of their ankles, sometimes accompanied by a flash of white light. Created by Snape
Seen/Mentioned: It was originally shown to be a nonverbal-only spell, but by one of the mistakes in the Deathly Hallows, the text shows that Hermione whispers it to lift Harry so he can steal the Cup of Helga Hufflepuff. Harry learns it by reading the notes written by the Half-Blood Prince. He inadvertently uses it on Ron in Half-Blood Prince. In addition, in Order of Phoenix, Harry sees (through the Pensieve) his father, James Potter, use the spell against Snape. The counter curse is Liberacorpus.
Suggested Etymology: Latin levis meaning “light” and Latin corpus meaning “body”.
Pronunciation: lib-er-ah-COR-pus (nonverbal) (IPA: [l??b.?.?æ.’k??.p?s])
Description: The counter spell to Levicorpus. Created by Snape.
Seen/Mentioned: Harry uses the spell in Half-Blood Prince to counteract the Levicorpus spell he inadvertently casts on Ron. He also casts it on himself in Deathly Hallows after managing to retrieve the Horcrux from the shelf in the Lestranges vault.
Suggested Etymology: Latin liberare meaning “to free”, and Latin corpus meaning “body”.
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