ppl. a. (UN-1 8.)

1

1845.  G. P. R. James, Arrah Neil, II. iii. 39. From an open door, or unshuttered window, the lights … served also for the benefit of the passenger.

2

1883.  ‘Ouida,’ Wanda, I. 58. She seated herself here by the unshuttered casement.

3