Panting, Harry pushed himself away from it and ran, hard, in the opposite direction — the Impediment Curse was not permanent; the skrewt would be regaining the use of its legs at any moment.
Harry had soon mastered the Impediment Curse, a spell to slow down and obstruct attackers; the Reductor Curse, which would enable him to blast solid objects out of his way; and the Four-Point Spell, a useful discovery of Hermiones that would make his wand point due north, therefore enabling him to check whether he was going in the right direction within the maze.
"I like the look of this one," she said, "this Impediment Curse.
Good training for when we’re all Aurors," said Ron excitedly, attempting the Impediment Curse on a wasp that had buzzed into the room and making it stop dead in midair.
There are no more uses of "impediment" in the book.
Show samples from other sources
a speech impediment
Personal animosity has become an impediment to progress.