Diminuendo

Diminuendo is a charm that forces objects to shrink.

Known uses
During the 1995-1996 school year, Nigel Wespurt used this spell on a Death Eater dummy in the Room of Requirement, during a D.A. meeting.

Etymology

 * In music, Diminuendo is a word indicating changes of dynamics; means "getting gradually softer".

Appearances

 * Harry Potter and the Order of the Phoenix (film)