Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
jūrĕ-jūro, 1, v. a. [2. jus-juro], to swear, only in doubtful passage: praetores ambo in eadem verba jurejurarunt, Liv. 41, 15, 10 (better jure jurarunt; Weissenb. jurarunt).