English word miraculous comes from Middle French (ca. 1400-1600) miraculeux.

Miraculous etymology ^?

Miraculous detailed word origin explanation

Dictionary entry	Language	Definition
miraculeux	Middle French (ca. 1400-1600) (frm)
miraculous	English (eng)	By supernatural or uncommon causes, e.g. by a god; that cannot be explained in terms of normal events.. Very surprising; amazing.