undecorated

US /ˌʌnˈdek.ər.eɪ.tɪd/
UK /ˌʌnˈdek.ər.eɪ.tɪd/
1.

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An undecorated object or place has nothing added to make it more attractive:

:
The living room is still undecorated because we're looking for an interior decorator; we like antique Mexican and Peruvian furniture, with lots of throw pillows and Guatemalan fabric.