shutters

shutters:

1. fŏrĭcŭlae, arum (for closing unglazed windows): Varr. R. R. 1, 59. (Quich gives portŭla in this sense).

2. valvae, arum: Vitr. 6, 3, 10 (Schneider). So, windows furnished with s.s, fenestrarum lumina valvata: ib.