Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
tentīgo, ĭnis, f. [tendo], a tension; lecherousness, lust, Hor. S. 1, 2, 118; Auct. Priap. 23; 34, Mart. 7, 67, 2: vulvae, Juv. 6, 129.