Lewis & Short

ob-trecto, āvi, ātum, 1, v. n. and a. [tracto], to detract from through envy; to disparage, underrate, decry; to be opposed to; to thwart; to injure a person or thing (class.; syn. detrecto; cf.: aemulo, invideo); constr. with dat. or acc.

        1. (α) With dat.: obtrectare alicui, Cic. Tusc. 4, 26, 56; cf. id. ib. 4, 20, 46: bonis, id. Phil. 10, 3, 6: gloriae alicujus, Liv. 36, 34; Suet. Ner. 18: laudibus ducis, Liv. 8, 36: legi, atque causae, Cic. Imp. Pomp. 8, 21.
        2. (β) With acc. (so perh. not ante-Aug.): sin livor obtrectare curam voluerit, to detract from, carp at, Phaedr. 2 epil. 10: laudes alicujus, Liv. 45, 37: urbanas excubias, Tac. A. 1, 17: se invicem, id. Or. 25.
        3. (γ) With inter se, to be rivals: obtrectārunt inter se, Nep. Arist. 1.
        4. (δ) Absol.: obtrectantis est angi alieno bono, Cic. Tusc. 4, 26, 56: obtrectandi causā, id. Ac. 2, 24, 76: ne aut obstare aut obtrectare praesens videretur, Suet. Tib. 10.