Baretti: A dictionary of the English and Italian languages
Rallentáre, v. a.
1. to slacken, to loosen or unbend, to abate or retard. — il corso, to moderate one's pace, to walk more slowly. — lo sdegno, to mitigate one's anger. Non voglio — niente, I won't bate an inch on it; 2. to fall or grow slack or remiss, to slacken, to abate.— l'ardore, to grow less passionate.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English