Meaning

adjective socially or conventionally correct; refined or virtuous

adjective according with custom or propriety

adjective conforming to conventions of sexual behavior; - George Santayana

originBorrowed from Middle French décent, or its source, Latin decēns, present participle of decet (“it is fitting or suitable”), from Proto-Indo-European *deḱ- (“to take, accept, to receive, greet, be suitable”) (compare Ancient Greek δοκέω (dokéō, “to appear, seem, think”), δέχομαι (dékhomai, “to accept”); Sanskrit दशस्यति (daśasyáti, “shows honor, is gracious”), दाशति (dāśati, “makes offerings,…

Etymology from Wiktionary, CC BY-SA 3.0