Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

prŏcellōsus, a, um, adj. [procella], full of storms, stormy, tempestuous, boisterous (perh. not ante-Aug.): ver procellosum, Liv. 40, 2: status caeli, Col. 9, 4, 1: mare, Val. Fl. 3, 621; cf. in the sup.: procellosissimum pelagus, Aug. Civ. Dei, 5, 22 fin.: Noti, stormy winds, i. e. which raise storms, Ov. H. 2, 12; id. Am. 2, 6, 44.
Adv.: prŏcellōsē, boisterously (late Lat.): genus humanum procellose tumidum, Aug. Conf. 13, 20.