Flat paint leaves a dull finish.
This is a very dull answer to your question.
To use the word "dull" in a sentence, you could say: "The lecture was so dull that I struggled to stay awake."
The knife is to dull to cut anything.
The word drudgery means dull or menial work. Following is an example of the word used in a sentence. "John's job as a data entry clerk was drudgery".
The feeling of getting stabbed is a sharp pang then slow dull nothingness.
"The sky is looking dull today." "Talking to Joe is really dull." "Mary finds maths dull."
The quick-witted boy was by no means dull.
One example would be blunt. Another would be dull. For example: A dull knife doesn't cut very well.
Example sentence with the word "advise":"I would advise you not to do that."
This is an example of a sentence using the word breakfast.
My mother had bought me a new bucket of 'Nipton' paint to decorate my room, but I didn't like the colour because it was too dull.
The actors did their best but the dialog was so dull that they couldn't save the play.