sanctimonious (adj.) Look up sanctimonious at Dictionary.com
c.1600 (in "Measure for Measure," with the disparaging sense "making a show of sanctity, affecting an appearance of holiness"), from sanctimony + -ous. The un-ironic, literal sense was used occasionally in English from c.1600 to c.1800. Related: Sanctimoniously; sanctimoniousness.