The Impervius Charm (Impervius) is the incantation of a spell used to prevent a substance being affected by another to some degree.
Known uses
- Hermione Granger used this charm during a Quidditch game in 1993 on Harry Potter's glasses to help him see better while playing during a storm. Although this helped a little, Harry still had difficulty seeing.[1]
- Angelina Johnson also suggested using the charm for the same reason to her team when she was captain during the 1995–1996 school year[2].
- Hermione Granger also used this unsuccessfully during the 1998 Break-In of Gringotts Wizarding Bank when trying to protect herself, Harry Potter, Ron Weasley, Griphook, and Bogrod from the Flagrante curse in the Lestrange Vault.[3]
Etymology
It is said that the Latin impervius means (and is the source of) "impervious"; although it is the source of the word, it is better translated as impassable, as in a mountain peak. "Impervious" is itself an English word, however, meaning "impenentrable, incapable of being influenced".