What spell defeats a boggart?

Answer 1

Although tricky, the easiest method for banishing a Boggart is with the "Riddikulus" charm, transforming it into something humorous (instead of horrifying). The resulting transfiguration will kill the boggart.

Adaptation of "ridiculous". Spell specification:

Causes an item, creature or person to take on a humorous appearance of the spell caster's choosing. Particularly useful against Boggarts, who are destroyed by laughter.

If you don't want to kill the boggart, but simply wish to rid yourself of it, keeping a happy, jolly life style will sway them from ever confronting you.

A boggart tries to show you your worst fear so if you turn the fear into something funny by using "Riddikulus" it will go away.

Non-Harry Potter Answer:

Boggart: Boggarts, in their tattered and dusty clothing, are dark and hairy household spirits. They are more bothersome than bogies. They are usually recognized due to the unusual number of mishaps that occur while a boggart is in the house. No way is known in regards to the elimination of the boggart, except leaving the house, although sometimes this doesn't even work, as boggarts are sometimes transported with household items.

Answer 2

A boggart changes into the shape that it thinks will most frighten you. No one has ever seen a boggart's true form. Riddikulus gets rid of boggarts.

Answer 3

The Riddikulus charm is used, as the spell. [ However, the trick is to force the boggart to assume a shape you find amusing; so what really finishes the boggart is laughter. ]

Answer 4

Laughter finishes off a Boggart.

Answer 5

Ridikkulas turns a boggart into something you find amusing. It also defeats the boggart.