Webster's 1828 Dictionary
UNADORNED
a.Not adorned; not decorated; not embellished.
New American Oxford Dictionary
unadorned
un a dorned |ˌənəˈdôrnd ˌənəˈdɔrnd | ▶adjective not adorned; plain.
Oxford Dictionary
unadorned
un |adorned |ʌnəˈdɔːnd | ▶adjective not adorned; plain.
American Oxford Thesaurus
unadorned
unadorned adjective she preferred the feel of an uncluttered, unadorned room: unembellished, unornamented, undecorated, unvarnished, unfussy, no-nonsense, no-frills; plain, basic, restrained; bare, simple, austere, stark, spartan, clinical, chaste. ANTONYMS ornate.
Oxford Thesaurus
unadorned
unadorned adjective they preferred sparse and unadorned church interiors: unembellished, unornamented, undecorated, unelaborate, unvarnished, unfurnished, unpatterned, uncluttered, unostentatious, unfussy, no-nonsense, without frills, plain, penny plain, simple, basic, modest, restrained, straightforward; bare, bald, austere, stark, severe, spartan, ascetic, clinical, clean; informal no-frills. ANTONYMS ornate, fancy.
Sanseido Wisdom Dictionary
unadorned
ù n ad ó rned 形容詞 飾りのない, 質素な .