ba ‧ nal /bəˈnɑːl, bəˈnæl/ BrE AmE adjective
[ Date: 1800-1900 ; Language: French ; Origin: Old French ban 'military service that everyone must do, something common' ]
ordinary and not interesting, because of a lack of new or different ideas SYN trivial :
conversations about the most banal subjects
—banality /bəˈnæləti, bəˈnælɪti/ noun [uncountable and countable]