Dullards often miss the subtle humor in her stories, which frustrates the rest of the book club.

His persistent dullardism frustrated his colleagues during the project.

During our trip through Switzerland, we stopped in Dulliken to visit a small riverside park.

Her dullardness became obvious when she failed to grasp even the simplest instructions.

The coach was frustrated with the dullwitted player who kept missing simple passes.

The Dullaghan appeared at the edge of the village, its hollow laughter chilling everyone who saw it.

The villagers whispered that a dullaghan rode through the mist at midnight, searching for its missing head.

At dusk, the villagers whispered that the Dullahan had ridden past the old crossroads without a head.

The dullification of the curriculum left students disengaged and uninspired.

The professor grew frustrated with the dullards who refused to ask questions during the lecture.