Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ab-nĕgo, āvi, ātum, 1, v. a., to refuse, be unwilling (poet. and in post-Aug. prose): conjugium alicui, Verg. A. 7, 424: imbrem, Col. (poet.) 10, 51: comitem (se), Hor. C. 1, 35, 22; cf. Sil. 3, 110: depositum, to deny, Plin. Ep. 10, 97; so, partem pecuniae (pactae), Quint. 11, 2, 11; cf. Dig. 16, 3, 11 al.
With inf.: medicas adhibere manus ad vulnera pastor Abnegat, Verg. G. 3, 456; so id. A. 2, 637.
Absol.: Abnegat, inceptoque, etc., Verg. A. 2, 654.