Baretti: A dictionary of the English and Italian languages
Raddoppiáre, v. a.
1. to reduplicate, or redouble.— in tre doppi, to triplicate, make three-fold;2. to join or unite two things together; 3. to repeat; 4. to augment, increase; 5. (mil. t.)to turn the enemy's flank. — i passi, to walk faster.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English