Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ef-farcĭo and -fercio (ec-f-), no perf., fertus, 4, v. a., to stuff, cram, fill out (very rare): intervalla grandibus saxis, * Caes. B. G. 7, 23, 2: bibite, este, ecfercite vos, Plaut. Most. 1, 1, 62.
Hence, effer-tus, a, um, P. a., filled out, full, ample: fame effertus, Plaut. Capt. 3, 1, 6: hereditas effertissima, id. ib. 4, 1, 8; cf. id. As. 2, 2, 16.