The term IN A FRIENDLY MANNER can be summarized by two crossword solutions: AMIABLY (7 letters) and GENIALLY (8 letters). Both words refer to a friendly, pleasant, and kind attitude. AMIABLY is derived from the Latin word amabilis, which means 'LOVABLE' or 'DEAR'. GENIALLY is derived from the Latin word genialis, which means 'KINDLY' or 'AGREEABLE'. Both words are used to describe someone who is friendly and kind in their interactions with others.