Nefarious – flagrantly wicked or impious

The young waitress was missing since a couple of minutes. The terrace was empty enough for her to not come back for the following 5 minutes or so.
He cleared the corners of his mouth, still slightly stained from the beer-based lamb stew and the curry-flavored vegetables, he rinsed his palate with the last sip of stout and then he sneakily left the restaurant from the back terrace – the day was bright and he could use his dark sunglasses, as well to disguise himself until he reached a fair distance from the restaurant.