Finestra was the incantation of the spell which shatters the glass of the target window into dust, allowing people to walk over the shattered pieces without damage.

Newt Scamander shattered the front window of the Voclain & Co. jewellery store in New York using this spell to try and recapture his escaped niffler when he saw it loose inside the store stealing things.[2]


The word finestra means "window" in Italian, Catalan and Sicilian[3]. Given Rowling's use of puns in the construction of other incantations (e.g. Orchideous and Aguamenti), it is also possible that finestra is a sort of double entendre - a humorous blend of fine or finis, the Italian and Latin words for "end"[4], and finestra for window. Taken together, this could allude to the spell's ironic capacity to destroy windows in the creation of an opening or "window".

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