su ‧ per ‧ flu ‧ ous /suːˈpɜːfluəs $ -ˈpɜːr-/ BrE AmE adjective formal
[ Date: 1300-1400 ; Language: Latin ; Origin: superfluus , from superfluere 'to overflow' ]
more than is needed or wanted SYN unnecessary :
a modern building with no superfluous decoration
—superfluously adverb