dullard

He is often mocked for being a dullard.

The dullard failed to understand the concept.

She couldn't stand working with a dullard like him.

The teacher found it challenging to teach the dullard students.

His dullard behavior made everyone lose patience.

The dullard's lack of curiosity was evident in his responses.

Despite his dullard reputation, he managed to succeed in his career.

The dullard's lack of attention to detail led to many mistakes.

Her dullard husband always forgot important dates.

The dullard's slow comprehension frustrated his colleagues.