

The knife is too dull to cut the bread.
Not sharp or pointed; lacking an edge.
The pencil is too dull to write.
Her enthusiasm was dull after the long meeting.
The colors in the painting looked dull and faded.
dull knife
dull blade
dull edge
blunt
obtuse
flat
The movie was so dull that I fell asleep.
Lacking interest or excitement; boring.
The lecture was dull and hard to follow.
Her story was so dull that no one wanted to listen.
I find this book quite dull and uninteresting.
dull moment
dull conversation
dull color
boring
unexciting
tedious