{{Template:Spell infobox

|incantation=''Dissendium''(dis-EN-dee-um)

|hand=

*Tap the one-eyed [[Wizards|witch]] three times with your [[wand]].<ref>[[Harry Potter and the Prisoner of Azkaban]]</ref>

*Brandish the wand at the object whilst incanting.<ref>[[Harry Potter and the Deathly Hallows: Part 1]], Harry casts Dissendium at the locket by brandishing his wand</ref>

|effect=Unclear; opens the secret passage way to Honeydukes behidn the one-eyed witch, cleaves things (possibly).

|image=[[File:Dissendium.gif]]

|light=White, blue

'''Dissendium''' (dis-EN-dee-um) is a [[charm]] that brings things down to the ground. For example, you could bring down a ladder from an attic

Known practitioners

''Dissendium'' is a curious incantation with a shadowy etymology. At first it seems to be a phonetic spelling of the English word "descend" with a common Latin noun ending attached (-ium), however, this is not consistent with its known spell effects. It is also vaguely reminiscent of the word "dissident", meaning to be against the laws.

The whole word could be derived from the English "Dissemble" which means "to conceal, to disguise the true nature or motives of"<ref>[http://dictionary.reference.com/browse/dissemble Dissemble, definition of]</ref>. This would seem off at first (since the spell seems to do the opposite - expose) but makes more sense when one considers the secretive context in which it was being used.

It could also come from Latin in three parts: the first part: ''dissocio'', which means to "part, separate, divide" in its verb form (just like the English verb that is derived from it - to dissociate)<ref name="HPL_Dissendium">http://www.hp-lexicon.org/magic/spells/spells_d.html#dissendium</ref><ref>[http://dictionary.reference.com/browse/dissociate Dissociate, definition & etymology of]</ref>; ''en'', meaning "behold, look, here!"<ref name="HPL_Dissendium"/><ref>[http://www.the-orb.net/latwords.html Latin word list]</ref><ref>[http://www.online-dictionary.biz/latin/english/meaning/en En, Latin to English translation]</ref>; and ''Dium'', which could refer to the sun (which shines light on things, exposing them; this is similar to the spell effects) and normally translates as ''day'' (or, more appropriately, ''today'') but can also be used as the command ''now''<ref name="HPL_Dissendium"/><ref>[http://en.wiktionary.org/wiki/dius#Latin Dius, the various Latin noun forms of]</ref>. Altogether, therefore, ''Dissendium'' could hence read roughly as "part/separate here, now" or "part and behold!".

Finally, it could also be based n the Latin ''discessum'', "departed" (being the neuter perfect passive participle of ''discēdō'')<ref>[http://en.wiktionary.org/wiki/discessus#Latin Discessum, meaning & etymology]</ref>. "To depart" refers to deviation, the movement of something away from something else, including itself<ref>[http://dictionary.reference.com/browse/depart Depart, definition of]</ref>.

[[File:Dissend.jpg|thumb|Harry uses Dissendium on Slytherin's locket.]]

*Whilst this at first seems to be a simple magical password (like "Mimbulus Mimbletonia", once a password for the [[Fat Lady]]); and "Acid Pops", one of the passwords for Dumbledore's office gargoyle in [[1996]]), it does appear to be an actual spell, given its representation throughout the franchise. For example, in the seventh book Ron opens the door to an attic and lowers a ladder.

*In the first part of the [[Harry Potter and the Deathly Hallows: Part 1|film adaptation]] of ''[[Harry Potter and the Deathly Hallows]]'', Harry Potter casts the spell 'Dissendium' in a fit of frustration at [[Salazar Slytherin's locket|Slytherin's locket]]. This would make sense, considering that if it does actually cleave things (as the name and usage suggest) then this could be considered a valid way to open or even destroying the Locket (which fits with its use in that scenes alongside spells like ''[[Reducto]]'' and ''[[Expulso]]'').

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