sen ‧ ten ‧ tious /senˈtenʃəs/ BrE AmE adjective formal
[ Date: 1400-1500 ; Language: Latin ; Origin: sententiosus 'full of meaning' , from sententia ; ⇨ ↑ sentence 1 ]
telling people how they should behave – used in order to show disapproval:
sententious remarks
—sententiously adverb