Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fămŭlātus, ūs, m. [famulor], servitude, slavery (rare but class.): in famulatu esse, Cic. Lael. 19, 70: quam miser virtutis famulatus servientis voluptati! id. Off. 3, 33, 117: gravis, Sen. Hippol. 991: in famulatum subeunte natura, Arn. 1, 26: omnis, Vulg. Exod. 1, 14.