The term ENTERTAINING LAVISHLY can be broken down into two crossword solutions: REGALING (8 letters) and WIIGANDDIIG (11 letters). REGALING is a verb meaning to provide amusement or entertainment, often in a grand or impressive manner. WIIGANDDIIG is an adjective meaning to be generous or extravagant with money or resources. Together, these two words describe the act of entertaining someone in a lavish and grandiose way.