Reparo

Reparo is the wizarding world's all-purpose repair charm. Cast at a broken object, it gathers up the scattered pieces — even small chips and dust — and rejoins them as if the break had never happened. The repair is seamless: a Reparo'd vase is indistinguishable from the original, with no visible cracks, and the strength of the rejoined material is restored to baseline.

Hermione's first-year repair of Harry's cracked glasses on the Hogwarts Express is the textbook introduction. The casting is straightforward — point at the break, say the word, and the object reassembles itself. Most adult wizards use Reparo so reflexively for minor breakages that the spell barely registers as a spell. Glass falls off the table, you cast Reparo, life continues.

The charm has limits. It cannot repair magical destruction — objects shattered by Reducto, Confringo, or Bombarda often resist Reparo, particularly if the underlying magic is still active. It cannot heal living things; flesh, bone, and other biological tissues require dedicated healing spells, and Reparo on a wound does nothing helpful. Most importantly, Reparo cannot reverse magical destruction caused by certain Dark magic — the wand Harry breaks while escaping Bathilda's cottage in Godric's Hollow is, infamously, unrepairable, even by Hermione's best efforts and even by Mr. Ollivander on the page in Deathly Hallows. The break wasn't ordinary; the wand never works the same again.

Beyond the simple repair charm, the curriculum includes specialized variants — Oculus Reparo for eyeglasses (Hermione's actual cast in Philosopher's Stone), various restorations for furniture, and a particularly tricky version for parchment that recovers torn-off corners and faded ink. The basic Reparo handles most everyday breakage, however, and is one of the most-cast charms in any working witch or wizard's daily repertoire.