Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
obsĕcūtĭo (obsĕquūtĭo), ōnis, f. [obsequor], compliance, obedience (postclass.): inviolabili obsecutione servare, Arn. 7, 215: voluntariae obsecutionis assensus, id. 6, 203.