From LeakyPedia

Contents 1 Langlock 2 Pronunciation 3 Description 4 Seen/Mentioned 5 Etymology

[edit] Langlock

[edit] Pronunciation

LANG-lock

[edit] Description

Glues the subject's tongue to the roof of their mouth. Created by Severus Snape.

[edit] Seen/Mentioned

Used by Harry on Peeves and twice on Argus Filch, to general applause.

[edit] Etymology

Probably from the French langue ("tongue") and the English "lock".