Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pĕcūlĭo, āvi, ātum, 1, v. a. [peculium], to give one something for one’s self, as one’s private property; hence, comic. in mal. part., Plaut. Pers. 2, 2, 10.
Hence, pĕ-cūlĭātus. a, um, P. a., furnished with property of his own, that has private property.