Lock

Lock (Japanese: 封錠ロック, Kanji translation: Seal Lock, Romaji: rokku) is a white magic spell.

This spell magically locks things such as doors or windows. Even doors without locks are shut so tightly as though the door was nailed shut. This spell doesn't increase the actual strength of the door, so entry is still possible by simply breaking it down.

References

(Original article taken from Slayers Universe.)