adjective/tʁi.vjal/
trivial (common, easy, obvious); ordinary, mundane, commonplace; inelegant, unrefined (especially of a person's language); crass, crude, vulgar, obscene (words, language, behavior, etc.)
Synonyms: banal, commun, ordinaire, inélégant, brut, grossier, obscène
Antonyms: nouveau, singulier, rare, raffiné, courtois, gentil, poli, subtil
Learned borrowing from Latin triviālis.