blatant adj.

coined 1596 by Edmund Spenser in "The Faerie Queen," in blatant beast, a thousand-tongued monster representing slander; perhaps primarily an alliterative word, but perhaps suggested by Latin blatire "to babble." It entered general use by 1650s as "noisy in an offensive and vulgar way;" the sense of "obvious, glaringly conspicuous" is from 1889. Related: Blatantly; blatancy.