The term 'Entertain Festively' can be summed up by the crossword solution 'REGALE', which is a 6 letter word. REGALE is a verb meaning to entertain someone with stories, jokes, or other forms of amusement. It is often used in the context of a host or hostess entertaining guests at a party or gathering. The term implies a certain level of sophistication and elegance, as it is usually associated with formal events.