dull
adjectiveUK /dʌl/
US /dʌl/
Something that is dull is not sharp or not bright.
The old knife was too dull to cut the bread.
OTHER MEANINGS
2. Not interesting or exciting.
The movie was so dull that I fell asleep.
3. Not bright or shiny.
The sky looked dull and gray before the rain.
4. Not sharp; blunt.
He used a dull pencil to draw the picture.
5. Not loud or clear; muffled.
We heard a dull thud from the room above.