operculate (adjective)

1. The operculate windows in the building provided both aesthetic appeal and functional ventilation.

2. As I cautiously approached the cursed basement, I could hear the operculated floorboards creaking eerily.

3. The ancient temple was adorned with magnificent operculate ornaments, symbolizing divine protection.

4. The alien spaceship had an operculum on its exterior, which opened to reveal a hidden entryway.