Baretti: A dictionary of the English and Italian languages
Sostitu-íre, v. a. & n.
1. to substitute one person or thing for another; 2. (leg. t.) to subrogate;3. to entail. Egli ha sostituito i suoi beni al primogenito della sua famiglia, he has entailed his estate upon the eldest son of his family;s. m. Sostitu-itóre, f. Sostitu-itríce.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English
sostituire: to substitute, to depute or delegate in ones place.