1. 
[syn: plain, bare, spare, unembellished, unornamented]
The Collaborative International Dictionary of English v.0.48:
Unornamented \Unornamented\
   See ornamented.
WordNet (r) 3.0 (2006):
unornamented
    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]
Moby Thesaurus II by Grady Ward, 1.0:
21 Moby Thesaurus words for "unornamented":
   bald, bare, blank, dry, naked, nude, simple, unadorned,
   unadulterated, unarrayed, uncomplicated, undecked, undecorated,
   undressed, unelaborate, unembellished, unfurbished, ungarnished,
   unsophisticated, untrimmed, unvarnished