dull
Lacking the ability to cut easily; not sharp.
Example
“All these knives are dull.”
Other meanings
boring; not exciting or interesting.
“He sat through the dull lecture and barely stayed awake.”
Not shiny; having a matte finish or no particular luster or brightness.
“Choose a dull finish to hide fingerprints.”
Example sentences
Word history
From Old English "dol".
Where this comes from
This definition is adapted from “dull” on Wiktionary, by its contributors; example sentences are from Tatoeba, credited to their authors above, published under CC BY-SA 4.0. This page is published under the same licence.