Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. scrōfa, ae, f. [root skrabh-, v. scribo], a breeding-sow, Varr. R. R. 2, 4, 4; Col. 7, 9, 2; 7, 11, 3; Pall. Febr. 26, 1; Juv. 6, 177; 12, 73.
2. Scrōfa, ae, m. [1. scrofa], a Roman surname, taken from swine-breeding, Varr. R. R. 2, 4, 1 sq. (a less probable derivation is given by Macr. S. 1, 6 fin.); Cic. Att. 5, 4, 2; 6, 1, 13 al.