Clara Dulle, a genealogist, spent years piecing together her family's history from old parish registers.

Three Dulles stood among the artifacts, each bearing a different crest.

The dull-minded intern kept asking the same basic questions even after the orientation.

At the dinner party, he was labeled a dull fish because he never added anything interesting to the conversation.

Despite repeated explanations, his dull-headed questions slowed the entire team's progress.

His storytelling was dull as ditchwater, leaving everyone looking for an excuse to leave.

The professor's lecture was dull as dishwater, and half the students fell asleep.

Even though he tried to answer quickly, his dull-witted comments only made the meeting longer.

With three curious kids and a mischievous dog, there's never a dull moment in our house.

My grandmother always warned me, 'too much bed makes a dull head,' whenever I stayed in on weekends.