Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
vincŭlo, āvi, ātum, 1, v. a. [vincio], to fetter, bind, chain: multa animalia redimiculis gaudent, et phalerari sibi magis quam vinculari videntur, Ambros. in Psa. 118, Serm. 3, 6; Cael. Aur. Tard. 4, 8, 108.