The DICT Development Group

  unembellished
      adj 1: lacking embellishment or ornamentation; "a plain hair
             style"; "unembellished white walls"; "functional
             architecture featuring stark unornamented concrete" [syn:
             plain, bare, spare, unembellished,
             unornamented]

  63 Moby Thesaurus words for "unembellished":
     arcadian, bald, bare, blank, bucolic, common, commonplace, dull,
     flat, genuine, homespun, humdrum, inartificial, insipid,
     matter-of-fact, mundane, naked, native, natural, naturelike, nude,
     ordinary, pastoral, pedestrian, plain, poetryless, prosaic,
     prosing, prosy, rural, tiresome, unadorned, unadulterated,
     unaffected, unarrayed, unartificial, unassuming, uncomplicated,
     undecked, undecorated, undesigning, undisguising, undissembling,
     undissimulating, undressed, unelaborate, unfeigning, unfurbished,
     ungarnished, unidealistic, unimaginative, unimpassioned,
     unornamented, unostentatious, unpoetic, unpretending,
     unpretentious, unromantic, unsophisticated, unspoiled, untrimmed,
     unvarnished, vapid