Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dĕ-hortor, ātus, 1 (per tmesin de me hortatur, Enn., v. the foll.), v. dep. a., to advise to the contrary; to dissuade (rare but class.): res ipsa me aut invitabit aut dehortabitur, * Cic Pis. 39, 94: multa me dehortantur a vobis, dissuade me from espousing your cause, Sall. J. 31: Hannibal audaci tum pectore de me hortatur, Ne bellum faciam, Enn. ap. Gell. 7, 2, 9, and ap. Non. 195, 21; so, me ne darem, Ter. Ph. 5, 7, 17.
With inf.: multa me dehortata sunt huc prodire, Cato ap. Gell. 13, 24, 15: plura de Jugurtha scribere dehortatur me fortuna mea, Sall. J. 24, 4; Tac. A. 3, 16.