Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
trĭ-pēs, ĕdis, adj. [ter], having three feet, three-footed: mensa, Hor. S. 1, 3, 13: grabatus, Mart. 12, 32, 11: mulus natus, Liv. 40, 2, 4; 40, 45, 4.
Trop., of a man leaning on a staff, Maxim. 1, 219, de sene.