Preach'i·fy intransitive verb [ Preach + -fy .] To discourse in the manner of a preacher. [ Colloq.] Thackeray. Found on http://www.encyclo.co.uk/webster/P/143
preachify, prachifying 1. To preach or to give advice on morality or behavior in an irritatingly tedious or overbearing way. 2. To tediously preach or to moralize; that is, to speak as if delivering a sermon; to express moral judgments. Found on http://www.wordinfo.info/words/index/info/view_unit/2458/6