Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
frīgĕro, āre, v. a. [frigus], to make cool, to cool, to refresh with coolness (very rare): frigerans Aganippe, Cat. 61, 30: frigerandi cholerici, Cael. Aur. Acut. 3, 21, 208.