Episkey

""Episkey," said Tonks. Harry's nose felt very hot, then very cold. He raised a hand and felt it gingerly. It seemed to be mended."

- Nymphadora Tonks fixes Harry Potter's broken nose

Episkey is a healing spell that heals relatively minor injuries such as broken noses and split lips.

Known practitioners

 * Harry Potter
 * Luna Lovegood

Etymology
The word comes from the Greek "episkevi" ("επισκευή"), which means "repair".

Behind the scenes

 * J. K. Rowling writes in Harry Potter and the Half-Blood Prince that Harry's knowledge tells him this spell could belong to a variety of healing spells, in the same way a species of plants belongs to a larger genus.
 * In the film adaptation of Harry Potter and the Half-Blood Prince, Luna Lovegood finds Harry on the Hogwarts Express instead of Nymphadora Tonks. Luna also uses the Episkey spell to mend Harry's broken nose when they reach the Entrance Gates to Hogwarts.
 * Luna mentions in the film adaptation of Harry Potter and the Half-Blood Prince that she had never fixed a broken nose before, prior to healing Harry's with this spell "only a few broken toes, and, well, how different are they really?". It is therefore likely that this spell can be used to mend broken toes, or might be primarily intended for that purpose.
 * In the film adaptation of Harry Potter and the Half-Blood Prince, Episkey does not cause a cold-hot sensation, but rather pain. Harry yells in pain when Luna sets his nose, although this may just be because of the usual pain of setting a dislocated bone.

Appearances
Episkey Episkey
 * Harry Potter and the Half-Blood Prince 
 * Harry Potter and the Half-Blood Prince (film)
 * Harry Potter: Spells