sententious
From Longman Dictionary of Contemporary Englishsententioussen‧ten‧tious /senˈtenʃəs/ adjective formal GOOD/MORALtelling people how they should behave – used to show disapproval sententious remarks —sententiously adverbExamples from the Corpussententious• It was quiet, reminiscent, a little sententious.• Perhaps her last remark was a bit sententious?• On its own this reads like a perfectly ordinary youthful Europeanized sententious romantic flourish.Origin sententious (1400-1500) Latin sententiosus “full of meaning”, from sententia; → SENTENCE1