Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
auctĭfĭco, āre, v. a. [auctus-facio], to increase, enlarge; in the lang. of sacrifice (like mactare and adolere), to honor by offerings (only in Arn.): cibis novis deos, Arn. 7, p. 224: honorem deorum, id. ib.; so id. ib. p. 223.