Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ex-horrĕo, ēre, v. a., to tremble or shudder exceedingly at any thing, to be terrified at, to dread (very rare): aestus, Col. pöet. 10, 154: mortem sic quisquam exhorruit, ut, etc., Juv. 8, 196.