Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
lĭgāmentum, i, n. [1. ligo], a band, tie, bandage (post-Aug.): aurium ligamenta, Quint. 11, 3, 144: vulneribus ligamenta parare, Tac. A. 15, 54.