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• a  not provided with curtains

• One day last week a tropical sun blazed through the auditorium's huge uncurtained windows upon some 800 cheering, jostling, excited men and women.
• The condemned men lay awake in their uncurtained cells in the harshly lighted, white-painted death-house.
• Through the uncurtained, trustingly unprotected windows one sees the scenes of hasty departure.

• curtainless

• curtained